After you finish the exercises, you’d better have your answers ___________.
| A．checking | B．checked | C．to check | D．check |
Could you please _______ your clothes?
| A．fold | B．make | C．sweep | D．do |
—Could I use your computer?—Sorry, I will ________ it.
| A．work in | B．work at | C．work on | D．work over |
—Could I borrow your book?—Of course, you _______.
| A．can | B．must | C．should | D．will |
---- Last night,you forget _____off the computer when you went to bed.
----- Really?I remember _____off.
| A．to turn,to turn | B．to turn, turning |
| C．turning,turning | D．turning,to turn |
Look! There are many people ______ in the lake.
| A．are swimming | B．to swim |
| C．swam | D．swimming |