Acid rain comes from _____.
| A．the river | B．the water | C．the clouds | D．the forests |
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 |
____is said that_______tourists visit Geyuan Garden every day.
| A．That;thousands of | B．It;five thousand of |
| C．It;thousands of | D．This;three thousand of |