1 . —What’s the secret of success, Dr Know?
—More time and effort, __________you’ll make it someday.

A．yet

B．or

C．and

D．but

2 . —Lucy, there__________too many things on the desk. What a mess!
—Sorry, Mum. I’ll put them away.

A．have

B．is

C．are

D．has

3 . All customers__________to take their temperatures when they enter the supermarket.

A．is asked

B．was asked

C．are asked

D．were asked

4 . —Ms Griffin, what should we do__________stupid mistakes in the coming exams?
—Be more careful.

A．avoid make	B．avoiding making
C．avoid making	D．to avoid making

5 . Aizhai Bridge ________ in March 2012 and it is one of the highest bridges in Asian.

A．built

B．was built

C．is built

D．has been built

6 . A group of elephants in Yunnan Province have trouble ________ a proper living place. We should help them.

A．find

B．to find

C．finding

D．found