- ________ book is this?
-- It's Mary's.
| A．Whose | B．Where | C．How old | D．How many |
I don’t know if hetomorrow. If he, I’ll tell him about it.
| A．will come, will come | B．comes, comes |
| C．comes, will come | D．will come, comes |
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 |