Answer: B. waterways

Detailed reasoning: The passage defines canals as “man made waterways,” explains what they connect, what they are used for, and how locks help boats move up and down. So the main topic is waterways (specifically canals as waterways), not roads in general.

Option-by-option analysis:

A. roads → The text mentions roads only to compare; the focus is canals.

B. waterways → Correct; canals are described as waterways and explained in detail.

C. water transportation → Transportation is one function, but the text also explains structure (locks) and connections.

D. world's finest canals → The text does not discuss “finest” canals as a category; it explains canals generally.

E. straight and narrow roads → Only a comparison; not the topic.

LaTeX note (required symbols): The focus on canals as waterways is \( \gt \) the brief comparison to roads.

Answer: E. To connect rivers, lakes, and oceans.

Detailed reasoning: The text says canals “connect rivers and lakes, oceans so that boats and ships can go from one to the other.” That sentence directly gives the purpose.

Option-by-option analysis:

A. To lift boats → Lifting happens by locks, but it is not the main stated reason for building canals.

B. To rise water → Not stated; the text explains water movement inside locks, not “rise water” as a goal.

C. To store sewage → Sewage is carried away, not “stored,” and it is only one possible use.

D. To hold a giant tank → The tank (lock) is a tool, not the main purpose.

E. To connect rivers, lakes, and oceans → Correct; stated explicitly in the text.

LaTeX note (required symbols): Connecting waterways is \( \gt \) any single secondary use like carrying sewage.

Answer: E. oceans and oceans

Detailed reasoning: The text states canals “connect rivers and lakes, oceans so that boats and ships can go from one to the other.” This supports connections involving rivers/lakes/oceans, but it never states that canals connect one ocean directly to another ocean.

Option-by-option analysis:

A. rivers and lakes → Supported by “connect rivers and lakes.”

B. oceans and lakes → Possible within the idea of connecting lakes and oceans through waterways, but not as clearly stated as rivers-lakes; still not the best “EXCEPT.”

C. rivers and rivers → Implied because canals help boats travel “from one to the other,” and rivers are part of what is connected.

D. rivers and oceans → Directly implied by “connect rivers ... oceans.”

E. oceans and oceans → Not stated; this is the clearest exception.

LaTeX note (required symbols): Text support for “rivers and lakes” is \( \gt \) text support for “oceans and oceans.”

Answer: E. winding

Detailed reasoning: The underlined word is “straight.” The opposite of straight (not curved) is winding (curved/turning).

Option-by-option analysis:

A. flat → Opposite of “steep,” not opposite of “straight.”

B. rough → Texture, not direction/shape.

C. bumpy → Surface condition, not direction/shape.

D. indirect → Related to not being direct, but “straight” here describes shape, not purpose.

E. winding → Correct; describes not straight, with many curves.

LaTeX note (required symbols): A winding path changes direction \( \gt \) a straight path.

Answer: C. A debate competition

Detailed reasoning: The announcement clearly states: “Our school will have a Debate Competition.” That exact phrase matches option C.

Option-by-option analysis:

A. A school debate → Too general; the event is specifically a competition.

B. A school competition → True but too broad; it does not specify debate.

C. A debate competition → Correct; directly stated.

D. Extracurricular activities → Not stated; the announcement is one specific event.

E. Participants of debate → Only one detail (participants), not the main topic.

LaTeX note (required symbols): “Debate competition” specificity is \( \gt \) the general phrase “school competition.”

Answer: B. is in the form of spoken arguments

Detailed reasoning: The event is a “Debate Competition.” A debate is characteristically delivered through spoken arguments. The text does not mention English level, written format, after-school hours, or the exact duration as “two days.”

Option-by-option analysis:

A. only for students with good English → Not stated; it says “All students in our school.”

B. spoken arguments → Best supported by the meaning of “debate.”

C. written arguments → Not suggested; debates are generally spoken.

D. after school hours → Not stated.

E. will run for two days → The schedule is “from \( 10 \)–\( 12 \) August \( 2008 \),” not stated as “two days.”

LaTeX note (required symbols): “All students” is \( \gt \) “only students with good English” in matching the announcement.