Clothing made of man-made materials has certain advantages over ________ made of natural ones like cotton, wool or silk．

one

what

that

the ones

This problem may lead to more serious ones if ________ unsolved．

left

remained

keeping

making

In recent years ________ global warming is becoming ________ concern of people all over the world．

the, the

/, a

/,/

the,/

I would rather you did some reading while you are free, but you ________．

don’t

didn’t

wouldn’t

weren’t

I will never forget such a beautiful village ________ I spent my childhood there with my grandparents．

where

that

in which

because

How long do you think ________ the computer company brings out a new product?

it will be before

will it be until

will it be when

it will be that

He wrote a lot of novels, ________ regarded as masterpieces．

dozens of them

dozens of which

a dozen of which

dozen of that

________ twice a year, whether it is a car, a bus or a truck, is the rule that every driver must obey in this city．

Examing

Having been examined

Being examined

Examined

It is nice to see millions who had nothing but a record of misery and hungry ________ to improve their life and living conditions．

having the chances

to have the chance

have the chance

had the chance

In no country, ________ Britain, it has been said, can one experience four seasons in the course of a single day．

other than

more than

better than

rather than