________ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
Since she is angry, we ____ her alone.
| A．had better to leave | B．would rather to leave |
| C．might as well leave | D．should as well leave |
. At that time she ___ sit here like that for hours.
| A．will | B．would | C．had to | D．shall |
Jack, don’t worry. You ____ get the textbook tomorrow.
| A．shall | B．will | C．may | D．can |
The travel costs ____ 2,000 dollars.
| A．reach as many as | B．are added up to | C．come to | D．add up |
The man didn’t choose __ of the suits and went away without looking at ___ third one.
| A．both; a | B．any; the | C．neither; the | D．either; a |