The line is busy. Someone _______ telephone.
A. must be using
B. must have used
C. should be using
D. should have used
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I _______ the League for 5 years so far.
A. joined
B. have joined
C. have been in
D. have taken part in
- Who jump the farthest in your school?- Henry ________.
A. does
B. jumps
C. has
D. is
- That must be a mistake.- No, it ________ be a mistake.
A. must not be
B. needn’t
C. cannot be
D. would not be
It seems like people will do almost anything to stay ______.
A. carefully
B. happily
C. young
D. strongly
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