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
____you eat the correct foods _____be able to keep fit and stay healthy．
A．Only if ; will you B．Only if ;you will
C．Unless ; will you D．Unless ; you will
The local government has done everything it can the buried miners．
A．save B．saving C．to save D．be saved
