Where is my backpack ? It’s the floor .
| A.under | B.in | C.on | D.at |
The people there did not allow them to set up a factory _____ pollute the water in the river.
| A.not so as to | B.so as not to | C.in order to | D.so that |
Spring is here. Everyone is looking forward to _____ a trip to the Forest Park.
| A.take | B.to take | C.taking | D.took |
--Mr. Smith, Can you give us some advice on how to learn English well’?
--Remember, Nothing can be learned well ______hard work.
| A.by | B.through | C.with | D.without |
_______December 11,2001, China formally became the 143rd member of the WTO
| A.in | B.On | C.At | D.Until |