Studies show that people are more ________ to suffer from back problems if they always sit before computer screens for long hours．

likely

possible

probable

sure

Snacks are generally high in calories and may ________ weight gain．

resulted from

relate to

benefit from

contribute to

He spent a whole day ________ in his study．

locking

being locked

locked

to be locked

It was from only a few supplies that she had bought in the village ________ the hostess cooked such a nice dinner．

where

that

when

which

The furniture is precious and huge glass windows that can be opened and closed give a ________ of the underwater world．

view

sight

scene

glimpse

A man can never have ________ many ties and a woman ________ have too many hats．

so, can't

too, can

too, can't

so, can

Since the early 1990s, China has been enjoying a(an)________ in scientific and technological development．

progress

boom

increase

advance

China has long been a leader in the field of genetic research ________ at improving agriculture．

aimed

aiming

being aimed

to aim

He was ________ failure as a teacher, but he has made ________ big success of his business．

a，不填

不填，a

不填，不填

a, a

It is said that the old coins ________ under the earth for about 100 years by the time they were discovered．

had buried

had been buried

buried

were buried