1 . The little girl couldn’t work the problem out. She wasn’t ______ clever.

A．that

B．much

C．enough

D．too

2 . The engineers made two big plans for the dam, ______ was never put in force.

A．one of them	B．which
C．one of which	D．every one of which

3 . Justin wanted to buy some hand-made silver accessories as souvenirs. He was told that the price will depend on the ______ of silver.

A．percentage

B．principle

C．gravity

D．option

4 . In the film The Million Pound Bank Note, Henry Adams is stuck in a foreign country without money and friends, and with nowhere to stay. While this situation _______ seem unusual, it _______ sometimes happen to travelers.

A．may; can	B．should; must
C．would; might	D．had better; ought to

5 . During a spacewalk, astronauts have to move slowly _______ their bodies under control.

A．keep

B．keeping

C．to keep

D．kept

6 . One of the reasons why the Russian space station Mir was brought down out of orbit is that Mir was too old and no longer a safe place ________.

A．to live in

B．living in

C．lived in

D．was living in

7 . ________ from the North Pole, the travelers wrote a book about his experience and had it published the following year.

A．Returned

B．Returning

C．Had returned

D．To return

8 . The stair carpet gets a lot of ________ and will soon need replacing.

A．wear and tear

B．rise and fall

C．ups and downs

D．touch and go

9 . A milkman ________ over the large stone spilled the milk everywhere.

A．tripping

B．tripped

C．was tripped

D．trips

10 . They have filled their homes with diverse products to ensure________supply during the cold wave over the following days.

A．numerous

B．external

C．limited

D．sufficient