.More than a dozen students in that school ＿＿＿ abroad to study medicine last year.
| A．sent | B．were sent | C．had sent | D．had been sen t |
I know he _________ here ten years ago .
| A．is living | B．lives | C．lived | D．has lived |
Someone is ringing the doorbell . Go and see ____________.
| A．who he is | B．who is he | C．who is it | D．who it is |
In order to finish the project , we need ___________ money .
| A．the large number of | B．a large sum of |
| C．a great many | D．a number of |
She ______have stopped her work halfway.
| A．ought to not | B．ought not to |
| C．not ought to | D．does not ought to |
The plant is dead. I ______it more water.
| A．will give | B．would have been |
| C．must give | D．should have given |