They stood in the rain for two hours, but they ____________ for Mr. Ying, because hedidn't come at all.
A. needn't have waited
B. can't have waited
C. mustn't have waited
D. may not have waited
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I advised_________ , but she turned a deaf ear to me.
A. her to swim not
B. her not swimming
C. her not to swim
D. her not swim
We can count ____________ his help whenever we are in trouble.
A. on
B. for
C. over
D. from
We planned to cross the river at night but ____________.
A. reached
B. succeeded
C. tried
D. failed
According to him, a series of discussion_________ held about the project.
A. is
B. Are
C. was
D. were