“What do you want to be?” asked Mrs．Crawford．“Oh, I ________ president,” said the boy, with a smile．

A．have been

B．am

C．was

D．will be

Happiness and success often come to those ________ are good at recognizing their own strengths．

A．whom

B．who

C．what

D．which

An artist who was recently traveling on a ferry to the southern island discovered ________ a long lost antique Greek vase．

A．at random

B．by chance

C．in turn

D．on occasion

Don't defend him any more．It's obvious that he ________ destroyed the fence of the garden even without apology．

A．accidentally

B．carelessly

C．deliberately

D．clumsily

He didn't selfishly keep for himself the money inherited from his uncle．Instead, he made a ________ contribution to help the community．

A．commercial

B．generous

C．comparable

D．profitable

People complain that decisions to approve or deny a permit are often ________ rather than based on fixed criteria．

A．appropriate

B．conscious

C．arbitrary

D．controversial

In much of the animal world, night is the time ________ for sleep-pure and simple．

A．set aside

B．set down

C．set off

D．set up

Butterflies ________ a sweet liquid produced by flowers, which bees and other insects collect．

A．carry on

B．feed on

C．put on

D．focus on

According to the law, all foreigners have to ________ with the local police within two weeks of arrival．

A．associate

B．dispute

C．negotiate

D．register

While intelligent people can often ________ the complex, a fool is more likely to complicate the simple．

A．sacrifice

B．substitute

C．simplify

D．survive