_____ carefully, Michael! There’s a school ahead.
| A．Drive | B．To drive |
| C．Drove | D．Driving |
Asstudents,wearesupposedtospendmoretime_________.
| A．study | B．studied | C．studying | D．tostudy |
________ his new sunglasses _______ Tony look mysterious.
| A．Wears; make | B．Wears; makes | C．Wearing; make | D．Wearing; makes |
Excuseme,couldyouhelpme?Idon’tknow_________exchangemoney.
| A．howto | B．how | C．howcan | D．howcan I |
We will write a letter to you as soon as I________free time．
| A．have | B．had | C．will have | D．am having |
We heard someone________in the next room．
| A．singing | B．to sing | C．sang | D．sings |