—Did you hear that Jack used to be a policeman for two years?
—You’re kidding! He ______, for he’s too short.
| A．can’t be | B．can’t have been |
| C．may not be | D．may not have been |
As I ________the house，I noticed a light upstairs.
| A．entered into | B．attached |
| C．appealed | D．approached |
It is worth considering what makes “convenience” foods so popular，and ________better ones of your own.
| A．introduces | B．to introduce |
| C．introducing | D．introduced |
________left the door unlocked must be held responsible for the accident.
| A．Whomever | B．Whoever |
| C．Whatever | D．Whenever |
—Why don't we take a little break?
—Didn't we just have________?
| A．it | B．that | C．one | D．this |
—I can't repair these until tomorrow，I'm afraid.
—That's OK. There's ________.
| A．no problem | B．no wonder |
| C．no doubt | D．no hurry |