The population of the world is growing at a dangerous ______.
A. step
B. measure
C. rate
D. progress
查看答案
根据我国法律规定，合同的担保形式通常有保证、质押、抵押、留置、定金等五种，其中保证是施工合同常见的担保形式。 ()
A. 正确
B. 错误
听力原文：W: May I use your dictionary？
M: Sorry, I lent it to Bob yesterday.
Q: What does the man mean？
(12)
A. He doesn't have the dictionary now.
B. He borrowed a dictionary from Bob.
C. He bought a dictionary.
D. He lost his dictionary.
Seldom______ in such a rude way.
A. we have been treated
B. have we been treated
C. we have treated
D. have we treated
A．do not existB．did not existC．haven't existedD．had not existed
A. do not exist
B. did not exist
C. haven't existed
D. had not existed
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