It’s not good for young students to stay ____ late at night.
| A．off | B．in | C．out | D．up |
Grandma is ill. I have to ________ her at home.
| A．look for | B．look up | C．look at | D．look after |
_______ smoke here, dad. Smoking has been banned in public places.
| A．Don’t be | B．Don’t | C．Not to be | D．Be not |
Li Hua’s shoes are as _______ as Zhang Hui’s.
| A．cheap | B．cheaper | C．the cheaper | D．the cheapest |
— Have you ever been to Nanning? — Yes, _______ .
| A．I was | B．I do | C．I am | D．I have |
Look! The boys _______ football on the playground.
| A．plays | B．play | C．are playing | D．played |