He couldn't ()the trip because he had no money.
A: make
B: take
C: go
D: get
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()yesterday, I would have asked him not to do that.
A: Provided he came
B: if he came
C: If he had come
D: Has he came
By 2050 the level of industrial pollution ()dangerous levels in many cities.
A: will have reach
B: will has reached
C: will have reached
D: will reach
Tom has to work ()his classmates since he is less clever.
A: twice as hard as
B: twice as hardly as
C: twice hard than
D: twice as harder as
-I got an A in Physics. -().
A: Don't worry about it
B: Congratulations! That's a difficult course
C: You are very good
D: Good luck to you!