Mr. White works with a chemical import&export company, but he ______ for this industrial fair, since he is on leave.
A. has worked
B. works
C. has been working
D. is working
查看答案
How can I ever concentrated if you ______ continually ______ me with silly questions?
A. have, interrupted
B. had, interrupted
C. are, interrupting
D. were, interrupted