If you decided to study in America, you have no choice but ________ your English greatly.
| A．improves | B．improving |
| C．to improve | D．improve |
—I sent him a most interesting storybook by mail this morning.
—You __________ so; he's coming tomorrow morning.
| A．needn't do | B．needn't have done |
| C．didn't need to do | D．didn't need to |
I was not __________ her presence till she spoke to me.
| A．aware | B．aware about |
| C．aware of | D．aware to |
People all over the country felt shocked __________ they heard of the news __________ eight children were killed at the school gate.
| A．the moment; that | B．when; which |
| C．immediately; / | D．the second; what |
I must apologize for __________ ahead of time.
| A．letting you not know | B．not letting you know |
| C．letting you know not | D．letting not you know |
You must __________ the key information in the text if you want to choose the correct answer.
| A．leave out | B．let out |
| C．make out | D．find out |