The fact has worried many scientists ________the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．whose |
He made up his mind to devote his life ______ the river ______ polluted.
| A．to prevent; to be | B．to prevent; from being |
| C．to preventing; to be | D．to preventing; from being |
---Are you firmly against any independence move by Taiwan?
---Of course. That’s ______ our basic interest lies.
| A．why | B．when | C．where | D．in which |
______ on a true story, the film is well worth ______ .
| A．Based; seeing | B．Basing; seeing | C．To base; to see | D．Based; to be seen |
Mr. Johnson ______ his boss ______ his careless mistake.
| A．apologized; about | B．apologized to; about |
| C．apologized to; for | D．apologized; for |
---What do you think made Celia so happy?
--- ______ a prize in the recent competition.
| A．She won | B．Won | C．Winning | D．Because of winning |