—Boys and girls, welcome to my home and ____.
—Thank you.
| A．help yourselves | B．help yourself |
| C．helps yourself | D．help you |
Which book is ______ to understand， this one or that one?
| A．easy | B．easier | C．easiest | D．the easiest |
I phoned Sarah last night， ______ there was no answer.
| A．and | B．but | C．or | D．so |
I always go skiing with my friends ______ winter.
| A．in | B．on | C．at | D．for |
The students are talking about ______ holiday plans happily.
| A．his | B．her | C．its | D．their |
--Would you please tell me __________________?
-- At 10:00 this evening.
A. when will the train leave
B. when the train will leave
C. when does the train leave