The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car.
A. has been B. was being C. had been D. would be
Years ago we didn't know this, but recent science ______ that people who don't sleep well soon get ill.
A. showed B. has shown C. will show D. is showing
They ________ on the program for almost one week before I joined them, and now we ______ it as no good results have come out so far.
A. had been working; are still working B. had worked; were still working
C. have been working; have worked D. have worked; are still working
—Why did you leave that position?
—I a better position at IBM.
A. offer B. offered C. am offered D. was offered
Scientists think that the continents always where they today.
A. aren’t; are B. aren’t; were C. weren’t; are D. weren’t; were
—Hurry up! Alice and Sue are waiting for you at the school gate.
—Oh! I thought they without me.
A. went B. are going C. have gone D. had gone
