________ anyone come to my office, please tell them I'm not available before four o’clock.
A. MightB. CouldC. WouldD. Should
Some friends persuaded me to apply to a combined M.D/Ph.D program ________ I could work in areas that wouldn’t be as open to me with only a Ph.D.
A. even ifB. so thatC. as ifD. in that
When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.
A. why it is B. what it does C. why it doesD. what it is
—What’s wrong with my computer, Jack?
—Let me have a check. OK, it works now.
—You mean, nothing wrong with it, ________ ?
A. is thereB. isn’t thereC. is itD. isn’t it
The dentist gave me a shot which took ________ almost immediately and I didn't feel a thing.
A. offenseB. chargeC. actionD. effect
International situation is currently undergoing great changes ________ UNESCO plays an irreplaceable role in promoting international cooperation.
A. which B. what C. where D. that
