Sandy is still puzzled about the meanings of some words. Help her match the words with their meanings.

发挥你的聪明才智吧，请你用下列各组词语尽可能多地造句。

(1)as for, at the moment, at home (school), on Monday, on the other hand, on the farm, in the middle of, because of

(2)how often (long, far), once a week, for seven days

(3)be good for, be good at, be different from, be stressed out, have a cold, have a good time (enjoy oneself), have to, go to bed, to camping (bike riding/sightseeing/hiking/fishing/ swimming), take walks, take a vacation, take the train (subway, bus), decider on, think about, stand for, hang out, depend on, come over

(4)want sb. to do sth., try to do sth., help sb. (to) do sth., help sb. with sth., plan to do sth., finish doing sth., enjoy doing sth., would like to do sth., It takes sb. some time to do sth., thanks for doing sth., make sb. do sth., use sth. to do sth.

开动脑筋，解读下列词语。

stand for, named after, love doing sth., enjoy doing sth., have a picnic, go down to, hand out, on a farm, moat of, use sth. to do sth., send sth. to sb., by fax, help sb. with sth., go swimming, boarding school, in winter, because of, my elder brother, enjoy oneself, play baseball, after class

发挥你的聪明才智吧，请你用下列词语尽可能多地造句。

enjoy doing sth., use sth. to do sth., help sb. with sth., enjoy oneself, stand for, by fax, go swimming, because of, in winter

从所给的四个选项中选择最佳答案

They have to work at once, ________ ?

[　　]

A．have they　　　B．do they　

C．don't they　　　D．haven't they