— Why do you eat so little?
— I’m _______ a diet to reduce some weight.
A. in B. on C. with D. under
Some policemen should be sent to _______ them _______ the animals.
A. prevent; to kill B. stop; killing
C. keep; to kill D. keep; killing
After going into the concert hall, Tom _________ a friend and went over to greet her.
A. searched B. stared C. spotted D. admired
—What do you think of the play?
—Terrible! I’ve never seen _________ one.
A. a worse B. a bad C. a better D. the worst
Between 4.5 and 3.8 billion years ago, the earth became so ______ that it was not clear whether the shape would last or not.
A. genuine B. slight C. solid D. violent
_______ Japan’s nuclear crisis (核危机) will be solved in 2011 is not known yet.
A. That B. If C. Whether D. What
