They were trying to remove harmful ___________ from cigarettes.
A.content | B.substances | C.materials | D.mixtures |
You’d better find an English pen friend ___ improve your writing.
A.so that | B.in order that | C.to | D.for |
There are 2100 students __ all in our school.
A.for | B.at | C.by | D.in |
You’d better __ electricity; it would be dangerous.
A.look out | B.take care of | C.watch out for | D.care about |
Mum, I think I’m __ to get back to school.---Not really, my dear.You’d better stay at home for another day or two.
A.so well | B.so good | C.well enough | D.good enough |
We were all surprised when he made it clear that he ___ office soon.
A.leaves | B.would leave | C.left | D.had left |