--- Excuse me , are you Tina ？ --- 。
A. No， I am B. Yes ， I am C. Yes， I’m not
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 |