1编号：17263题型：单选题测试正确率：57.58%
He smoked half a packet of cigarettes a day.
2编号：17262题型：单选题测试正确率：81.82%
（2010江苏镇江）The Gulf of Mexico（墨西哥湾） is being polluted seriously. That has affected several hundred kinds of sea animals there.
3编号：17261题型：单选题测试正确率：77.12%
He thought that you had gone to London least ten years ago.
4编号：17260题型：单选题测试正确率：67.8%
If you want to get this job, you should speak a foreign language.
5编号：17198题型：单选题测试正确率：64.91%
He may be slow but he’s reliable(可靠的).
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