What can we students do _____ the environment?
| A．to protect | B．protected |
| C．protecting | D．protects |
---If you don’t go to Lucy’s birthday party this evening,______.
----What a pity!She must be very sad if you don’t appear.
| A．so do I | B．neither will I | C．so will I | D．neither do I |
The Blacks have two children,but they would like to have ______child.
| A．the third | B．a third | C．third | D．three |
How kind you are!You always do what you can______me.
| A．help | B．helping | C．to help | D．helps |
The factory_____I worked last year is just the one I visited yesterday.
| A．which | B．where | C．that | D．who |
--Excuse me.Did you see a girl in red passing by just now?
----No,sir .I______a newspaper.
| A．read | B．was reading | C．have read | D．am reading |