当你想表达感谢时，你应该说：
A．Thank you. B．You're welcome.
Most of the children enjoy __________ computer games.
| A．play | B．playing | C．played | D．to play |
There is not enough __________ in the comer to put the table.
| A．place | B．room | C．floor | D．ground |
The Whites __________ many places of interest since they came to China.
| A．have visited | B．will visit | C．visited | D．visit |
—What did you do last night?
—I did my homework and __________ storybooks.
| A．reads | B．read | C．will read | D．am reading |
The doctor often tells him __________ more exercise.
| A．to take | B．taking | C．taken | D．take |