Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
It was raining heavily. Little Mary felt cold, so she stood _______ to her mother.
| A．close | B．closely | C．closed | D．closing |
The service shop ______ him 30 Yuan for repairing his TV set.
| A．asked | B．paid | C．owed | D．charged |
You _______ be tired—you’ve only been working for an hour.
| A．must not | B．won’t | C．can’t | D．may not |
–I’ll be back at 4:30. Will you still be here?
-- I’m afraid not. I’ll probably have gone out _______ then.
| A．by | B．since | C．from | D．till |
I hope you don’t mind me asking, ________ where did you buy those shoes?
| A．so | B．and | C．yet | D．but |