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【单选题】
保证三元催化转换器以最佳状态工作的空燃比是（）。A.
11.7比1
B.
1207比1
C.
1307比1
D.
1407比1
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【单选题】By successfully_____ the baton, the Chinese team finally won the championship.
A.
pass
B.
passes
C.
passed
D.
passing
【单选题】What can Internet users do when they have a choice of language preference?
A.
They can talk with academic elite from other countries.
B.
They can make their English more proficient.
C.
They can maintain website pages in their native tongue.
D.
They can contact a website in language other than English.
【单选题】I have just spent a holiday in Sanya and would ________ it to anyone. [ ]
A.
suggest
B.
propose
C.
recommend
D.
offer
【单选题】—Have you spent the whole holiday studying? — . [ ]
A.
Yes, I have
B.
Yes, I haven't
C.
No, I have
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