The professor spoke so fast during the lecture that we couldn’t _____ what he said.
| A．turn out | B．make out | C．carry out | D．leave |
When he heard the news , he stared at me ________．
| A．in amazement | B．in disguise | C．in brief | D．in particular |
The head of the company promised to deal with matters of this sort _____he returned to his office．
| A．until | B．while | C．by the time | D．the moment |
The disk ,digitally ______in the studio, sounded fantastic at the party that night．
| A．recorded | B．recording | C．to be recorded | D．having recorded |
Scientists are convinced _____the positive effect of laughter _____physical and mental health．
| A．of ;at | B．by; in | C．of ; on | D．on ;at |
We had wanted to finish our task by noon, but it didn’t quite ______．
| A．find out | B．give out | C．hand out | D．work out |