57._________A.keep B.stop C.protect D.prevent

To tip a barman or barmaid, it is customary to tell him to __________.A.“Keep this to yo

The committee system serves best to _______.A．keep the congressmen busyB．allow citizens to

We now ______ him by writing letters.A、keep away fromB、keep onC、keep in touch with

Measures should be taken to__________.A.keep slee

Paragraph 5______A.Keep Your Voice Low All the Ti

Paragraph 4______A.Keep Your Voice Low All the Ti