--- My dream is to build university on the moon some day.
--- It sounds like unusual dream. I wish you could realize it.
| A．a; a | B．an; a | C．a; an | D．an; an |
Miltie________a picture when Mr．Green came in．
| A．draw |
| B．will draw |
| C．drew |
| D．was drawing |
—Always look around________you cross the street，David．
—OK．I know，Mum．
A．until
B．before
C．unless
The thieves ran away at once when the burglar alarm(防盗报警器)________．
| A．went away |
| B．went out |
| C．went off |
| D．went through |
—Did you see Mr Smith when you were in France?
—No．When I________France，he________to China．
| A．had arrived in；had gone |
| B．arrived in；has been |
| C．got to；had gone |
| D．had got to；had been |
He told us that he________the letters in the morning．
| A．will post |
| B．have posted |
| C．was posting |
| D．had posted |