I can’t find my dictionary. I wonder whether Mary ______ it.(1.0)
A. used
B. has
C. is using
D. had
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The world’s supplies of copper ______.(1.0)
A. have been gradually being exhausted
B. have gradually exhausted
C. are gradually exhausted
D. are being gradually exhausted
This is the first time ______ such an accident.(1.0)
A. I see
B. I saw
C. I have ever seen
D. I had seen
The enemy ______ trouble.(1.0)
A. constantly make
B. were constantly making
C. were making constantly
D. were being made
-When is the concert supposed to start? -It ______ now.(1.0)
A. will about start
B. has about to start
C. is about to start
D. will start
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