----Be careful not to drop the Ming Dynasty vase. ----Yes, we can’t be _____.
| A．too careful | B．very careful | C．too careless | D．careless enough |
—Catherine, I have cleaned the room for you.
—Thanks, you __________it. I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
The boy wanted to ride his bicycle in the street, but his mother told him___________.
| A．not to | B．not to do | C．not do it | D．do not to |
There is nothing wrong with using a credit card for purchases. It’s more _______ than carrying loads of cash.
| A．convenient | B．valuable | C．sensitive | D．innocent |
Cathy is taking notes of the grammatical rules in class at Sunshine School, where she ______ English for a year.
| A．studies | B．studied |
| C．is studying | D．has been studying |
Are you suggesting that I _____ too old for the job?
| A．am | B．should be | C．be | D．was |