It is _____ challenge for graduates to find ____ work as unemployment is very high nowadays.
| A．the; 不填 | B．a; a | C．a 不填 | D．不填;不填 |
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 if B. so that C. as if D. 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 does | D．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 there | B．isn’t there | C．is it | D．isn’t it |
The dentist gave me a shot which took ________ almost immediately and I didn't feel a thing.
| A．offense | B．charge | C．action | D．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 |