—Boys and girls, please have a seat and ____.
—Thank you.
| A．help yourselves | B．help yourself | C．helps yourself | D．help you |
_______bad weather we are having !We've never had_______ rainy days.
| A．What a；such | B．How；so | C．What；such | D．What；so |
____________the window. What's happening there？
| A．Look off | B．Look over | C．Look out of | D．Look for |
____________of the twins passed the exam because they worked hard at their lessons.
| A．Every | B．Neither |
| C．None | D．Both |
—I think the man over there must be Bob.
-- It _______ be him. He has ______ to Australia.
| A．can’t, gone | B．can’t, been | C．may not, been | D．mustn’t, gone |
--Do you know ________ this dictionary belongs to?
--Let me see. Oh, it’s __________.
| A．who does, mine | B．who, me | C．whose, mine | D．who, mine |