Chemicals in the body______________ our food into useful substance.
A. mix up B. deal with C. bring in D. break down
When I stayed at Aunt Liu's, she would tell me about the great changes which___________ in the village.
A. have taken place B. had taken place
C. took place D. would take place
To do a bit for the motherland, _______________
A. working hard is necessary
B. to learn a foreign language is needed
C. it is important to master science
D. one should serve the people whole heartedly
—Did everyone pass the examination?
—No, only three of them who passed it.
A. there was B. it was C. these were D. that was
—Do you mind if I keep pets in this building?
—_______________________________________
A. I'd rather you didn't actually B. Of course not, it's not allowed here
C. Great! I love pets D. No, you can't
Are the two glasses believed___________ by Tom?
A. broken B. to be broken C. to break D. to have been broken
