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第6题:
The attendance at lectures is optional.
The attendance is strictly monitored.
The attendance is difficult to enforce.
The attendance is sometimes necessary.
第7题:
they are popular only among certain groups of people
their performances do not improve their fans morally
their primary concern is their own financial interests
they are not clear about the principles they should follow
第8题:
They are not good at manipulating colleagues.
They feel such behavior is unprincipled.
They think the effort will get nowhere.
They believe that doing so is impractical.
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第12题:
They helped to enrich American language.
They are the largest ethnic group in the USA.
Half a million Germans were in the USA during the American Revolution.
The commanders-in-chief in both world wars were of German ancestry.
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第15题:
Your heart rate is lowered.
It becomes harder to relax.
You become too tired to sleep.
Sleep rhythms are disrupted.
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第22题:
The world population is increasing faster and faster.
Half of the world’s water resources have been seriously polluted.
Humanity has not placed sufficient value on water resources.
Only half of the world’s water can be used.
第23题:
It had caused embarrassment to the British government.
It had greatly promoted her popularity.
It had brought her closer to the ordinary people.
It had affected her relations with the British government.
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