John thinks it won't be long ________ he is ready for his new job．

when

after

before

since

The cost of renting a house in central Xi'an is higher than ________ in any other area of the city．

that

this

it

one

Would you mind not picking the flowers in the garden? They are ________ everyone's enjoyment．

in

at

for

to

________ at my classmates'faces, I read the same excitement in their eyes．

Looking

Look

To look

Looked

The stars are so hot that they ________ great light and heat－more than the hottest, brightest fire you can imagine．

give away

give in

give up

give out

Experts at the conference agreed that such a product with environmentally friendly technology is ________．

worth being promoted

worthy promoting

worthy of promoting

worthy of being promoted

85％of the Australian population ________ in the six major cities around the coast．

live

had lived

has lived

is living

The red building is where the workers live, and the white one is where the spare parts ________．

are produced

will produce

produced

had been produced

Some people say more but do less ________ others do the opposite．

once

while

when

as

The atomic clock is ________ to within 3 seconds in a century．

gradual

diverse

accurate

medium