1 . ______ is well-known that Chinese has the largest number of native speakers.

A．This

B．What

C．It

D．That

2 . I hear that you _____ for Canada next week. Have you got everything ready?

A．leave

B．have left

C．are leaving

D．left

3 . Mary is quite patient and helpful, making her one of the most ______ teachers among the students.

A．active

B．popular

C．determined

D．efficient

4 . Summer days are long in Norway, ______ the sun doesn’t set until very late in the evening.

A．where

B．whom

C．why

D．which

5 . Wu Yue _______ the TV and began to watch the news programme on CCTV-1.

A．turned out

B．turned on

C．turned in

D．turned over

6 . —I’m really lucky to have won the first prize.
—______

A．Congratulations!

B．Best wishes!

C．No problem.

D．All right.

7 . With more and more people _____ in their spare time, the environmental protection of the local historic sites comes into focus.

A．travelling

B．travel

C．to travel

D．travelled

8 . What’s worse, addicted _____ the virtual world, some people grow more distant from their family and friends.

A．to

B．in

C．with

D．into

9 . Recently it has been noticed _____ an increasing number of students are bringing smartphones to school, _____ means using smartphones reasonably has become _____ unavoidable topic for us students.

A．/; that; a

B．that; which; an

C．/; which; an

D．that; which; the

10 . He obviously doesn’t want to be disturbed by us. Let’s leave him______.

A．behind

B．out

C．alone

D．aside