The pupils here_____ all kinds of exercises every day in the past few weeks.
| A．keptbusydoing | B．keepondoing |
| C．havekeptbusydoing | D．havebeenkeptbusydoing |
This soldier __ jump into the water and saved the boy.
| A．do | B．did | C．does | D．done |
I want to buy a pair of new trousers to ___ my sweater.
| A．go with | B．go off | C．go on with | D．go in for |
There goes the bell for the class.Let’s stop___.
| A．to talk | B．to be talking | C．talked | D．talking |
--Must we hand in our homework now?---No, you ___. You ___ hand them in before Friday.
| A．mustn’t , can | B．needn’t, can | C．can't , can | D．mustn’t, must |
When I was walking in the street, I heard my name ___.
| A．to call | B．calling | C．call | D．called |