The teacher demands that she her test papers within ten minutes. A.turn in B hands in C.have turned in D has handed in
The little girl ________ a cry at the sight of a big snake.
Penicillin was then produced ________ in order to meet the demands of the armies.
A study ________ in the U.S.A. in 1977 showed that the chemical ASA in aspirin could prevent a stroke. A. carrying out B. carried out C. working out D. worked out
I wonder if this is the computer you want______ .
The teacher insisted that I______ a mistake and insisted that I______ the physics problem again.