The driver should drive ____________ /’ sluli /when the traffic is heavy.

The expert offered us another piece of advice,_____of great help to our program. 

Isn’t it time you went to bed, Mike—I _____ painting all afternoon, so I have to finish my homework now.

The news finally came, which _____them all!

________ it is late, I shall go home now. —- OK, go________.