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

4 . 你为什么不听从我的建议，三思而后行？(汉译英)

7 . 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

8 . 我正在想这里的生活将会是什么样的。（汉译英）

9 . 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

10 . 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