1 . On social media sites, people tend to post only positive updates________ make them appear happy and friendly.

A．when

B．that

C．what

D．where

2 . That is________ when the stars are out, they are visible, but when the lights are out, they are invisible.

A．because

B．how

C．why

D．that

3 . Whatever our hobbies, the Internet can connect us with others________ also enjoy doing them, even if they live on the other side of the world.

A．which

B．who

C．whose

D．where

4 . Endurance, perseverance, industry and talent are the means ________ men can achieve great ends

A．in which

B．by which

C．of which

D．on which

5 . —When are you leaving?
—My plane _________ at 12:30.

A．takes off

B．took off

C．is about to take off

D．will be taking off

6 . It was the training ________ he had at school ________ made him a good jumper.

A．what; what

B．what; that

C．that; that

D．that; what

7 . The film brought the hours back to me ________ I was taken good care of in that far-away village.

A．when

B．until

C．that

D．where

8 . He said he would never forget the day ________ he spent with his girlfriend in the country.

A．that

B．when

C．how

D．where

9 . Bungee Jumping is a very popular sport, ________ courage matters more than strength.

A．that

B．why

C．where

D．which

10 . —Do you mind if I go out this evening?
—I don’t mind what you do ______you let me know ahead of time.

A．ever since

B．as long as

C．in case

D．even though