The Federal Reserve, _________ is the US central bank, and the Federal Deposit Insurance Corp, an independent agency of the government _________ backs bank deposits, will have an active role in providing the needed cash．

which;/

that; that

that; which

which; that

It won’t be quite a long time _________ your son is back, so don’t be worried．

that

since

before

until

Exercising regularly can not only _________ one’s strength,but also develop one’s character．

put up

take up

build up

pull up

_________, the driver looked at the vast desert without knowing if he could get across safely．

Tired and sad

Tired and sadly

Tiredly and sad

Tiredly and sadly

Busy as John is, exercise has always been _________ his work．

as much as a part of his life

as much a part of his life as

as a part of his life much as

so much a part of his life as

While dancing happily at home, ________．

the door bell rang

the door bell rings

we heard the door bell rings

we heard the door bell ring

They are just college graduates and don’t realize _________ to start and run a company．

what takes it

what they take

what takes them

what it takes

“We have just made a very difficult decision…we have decided to stop _________ QQ on computers _________ with 360's software．” Tencent said in an open letter on Wednesday night．

to run, installing

to run, installed

running, installing

running, installed

If people _________ virtual reality holidays, we _________ on an around-the-world tour．

invent; go

invented; had gone

invent; have gone

invented; would go

Every few years, the coal workers ________ their lungs X-rayed to ensure their health．

are having

have

have had

had had