We can’t work out the physics problem. Can you tell us ____?
A .how to do B. what to do it
C. how to do it D. what should to do
This question sounds _____ than that one.
A. many more polite B. much more polite
C. many more politely D.much more politely
Health is very _____and every student knows the _____of keeping healthy.
A. important ; importance B. important ; important
C. importance; importance D. importance; important
Our country _______ a lot in the last fifty years.
A. will change B. changed
C. changes D. has changed
She said she had some trouble ___________ her homework.
A. finish B. finishing
C. to finish D. Finished
---Is the notebook Carla’s?---It _____be hers. It has Mary’s name on the cover.
A. could B. might C. must D. can’t
