Who are you waiting ________ the school gate， Millie?
| A．不填 | B．for | C．at | D．for ， at |
—_____ will your English teacher come back?
—In two days.
A. How often B. How long C. How soon
Boys and girls, the books in the library should______ good care of.
A. take B. are taking C. be taken
—How do you go to school every day?
—____ bus. I think it is good for the environment to take a bus.
A. On B. At C. By
— Which do you prefer, green tea or coffee?
—________, thanks. I'd like a glass of water.
A. Either B. Neither C. Both
—Hi, Jack, there is ________ useful book on the desk. Whose book is it?
— It belongs to my brother．
A. a B. an C. the