She is a quiet girl at school，but sometimes she _____ be very naughty.
| A．should | B．would | C．will | D．can |
-My mathematics is very poor.
-Don’t worry. I’ll help you ______ I can.
| A．as far as | B．as soon as |
| C．as quickly as | D．as possible as |
-If you have time tonight，I’d like to invite you to a ball.
-That’s very nice of you，but are you ____?
| A．free | B．careful | C．serious | D．true |
How pleased the detective was _____ what his customer told him
| A．hearing | B．heard | C．to hearing | D．to hear |
-What did you think of ______ president?-I didn’t care for him at first，but after ____ time I get to like him.
| A．the； a | B．/； the | C．the； the | D．/； a |
How pleasant the picture is to _______！
| A．be looked | B．for looking at | C．looking at | D．look at |