The fact has worried many scientiststhe earth is becoming warmer and warmer these years.
| A． | what | B． | which | C． | that | D． | though |
--I didn't know this was a one-way street, officer.
------_________
| A．That's all right. | B．I don't believe you. |
| C．How dare you say that? | D．Sorry, but that's no excuse. |
--Which play shall we go and see?
----_______________.
| A．I'm afraid we can't | B．I don't think it's interesting |
| C．Yes, I quite agree with you | D．I'll leave it to you |
You _________think you're clever, but that doesn't give you the right to order me about!
| A．should | B．would | C．could | D．might |
--Jack's won _____________ holiday in London.
--_________ lucky fellow!
| A．a; A | B．the; The | C．a; The | D．the; A |
____________ great help; I could get rid of all the difficulty and succeeded.
| A．Offered | B．Having offered |
| C．Being supplied | D．Having supplied |