House prices increased __________ an average of 23% in 1998.
A. to B. by C. at
She’s never spent much money on her own clothes, ______ she?
| A．is | B．isn’t | C．has | D．hasn’t |
While heTV，a football flew into the room through the window．
| A．watches | B．is watching |
| C．was watching | D．Watched |
Put away your school things．Your stationery mustcarefully．
| A．be taken good care |
| B．be taken good care of |
| C．take good care |
| D．take good care of |
A boy _______ Tom _________ by a car yesterday.
| A．was called, hit | B．called, was hit |
| C．was called, was hit | D．called, hit |
-- So far, how long _______ you __________ China? -- For one year.
| A．have, come to | B．have, been to |
| C．have, been in | D．have, gone to |