一Professor Li, ______the student start at once or wait a while?
一At once.
A.will | B.shall | C.can | D.may |
Every few years, the coal workerstheir lungs X-rayed to ensure their health.
A.are having | B.have | C.have had | D.had had |
The plan _________ just because people were unwilling to cooperate (合作).
A.broke down | B.pulled down | C.turned down | D.put down |
Jack, I’m afraid I’ll turn to you.I think chemistry is _______ physics.
A.as a difficult subject as | B.a subject the same difficult as |
C.as difficult a subject as | D.the same difficult subject as |
Not until then did I find it _____ to do the job that way.
A.is easier | B.easier | C.was more easily | D.more easily |
Most of the professors _____ to our school were from South Africa.
A.invited | B.to be invited | C.being invited | D.had been invited |