It’s the gases ___ natural gas and the burning of coal give off ____ add to the overheating of the earth.
|
A．that; what |
B．that; that |
C．which; which |
D．that; which |
The teacher doesn’t believe his reason for being absent from class ___ he was ill, ____mad him sad.
|
A．that ; which |
B．why; which |
C．why; what |
D．that ;what |
—— Bob has gone to California.
—— Oh, can you tell me when he _____?
|
A．has left |
B．left |
C．is leaving |
D．would leave |
It’s easy to learn a country’s culture if one is ____ with its language and customs.
|
A．similar |
B．familiar |
C．sensitive |
D．flexible |
____ directly to the sun in summer will do great harm to our skin.
A. Be exposed B. Being exposed C. Exposing D. Exposed
It rained heavily overnight and not until this morning____.
A. did it stop B. had it stopped C. stopped D. it stopped
