The factory has produced many famous cars, none of ________ being shipped to foreign countries．

them

which

it

what

The successful launch of Tiangong-1 on Sept．29^th ________ a significant step in China’s plan to build a space station．

signaled

marked

signed

proved

Helping others is a habit, ________ you can learn even at an early age．

it

that

what

one

________ “Occupy Wall Street” movement started as ________ way of showing frustration(沮丧)about high unemployment, social inequality and other issues in American society．

a; a

The; the

不填; a

The; a

If you want to get more information on how to apply for studying overseas, you can go to the office of foreign ________ for details．

events

matters

affairs

business

________ by beautiful green mountains and situated at the foot of Huangshan Mountain makes Tai Ping Lake a famous tourist attraction．

Surrounded

Being surrounded

Having been surrounded

Surrounding

I have kept the photo ________ I can see it easily, as it reminds me of my happy childhood in the countryside．

in which

when

where

that

It’s really cold here．I have never experienced such terrible weather in my ________ life．

full

entire

complete

total

If ________ manking is trying to find new places in ________ space to live and get new resources, it is fine．

the; the

/;/

a; the

the; a

All flights ________ because of the storm, they had to wait in the hall．

have put off

were put off

have been put off

having been put off