在招标投保业务中，为了保障招标人的权益，常常使用的保函是（ ）
A. 投标保函
B. 履约保函
C. 留置金保函
D. 预付款保函
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银行为进口商先行提货而出面担保的行为是（ ）
A. 信托收据
B. 出口押汇
C. 进口押汇
D. 提货担保
Few of them hurt themselves in the accident last night,________
A. don’t they
B. didn’t they
C. did they
D. do they
-You’ve never seen dinosaur eggs, have you ?--_____. How I wish to visit the Dinosaur World.
A. Yes, I have
B. No, I haven’t
Certainly, I have
D. Of course, I haven’t
His sister had a bad cough, ______she?
A. wasn’t
B. doesn’t
C. hadn’t
D. didn’t
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