Many people tend to buy things from big store, ________ they believe the qualities are good．

at which

of which

which

where

It is said that ________ to classic music may be helpful in improving teenagers' taste．

exposed

exposing

being exposed

having exposed

________ the moment they heard the starting signal given by the teacher．

Ran the children down the hill

Down the hill did the children run

Down the hill the children ran

Down the hill ran the children

Johnny's uncle promises that the boy ________ get a nice present on Christmas Eve．

should

must

can

shall

Nothing but some ancient Chinese coins ________ in the sunken ship since they began the exploration．

were found

has been found

had been found

have been found

Patience is a kind of quality－and that's ________ it takes to do things well．

what

how

which

why

Henry hurried to the library only to find a notice at the gate, saying “No ________ before12 noon”．

permission

admission

submission

commission

Most students' attitudes towards fashion are reported ________ nowadays in a recent survey．

changing

to be changing

having changed

to be changed

________ this job, he will have to be faced with the challenging situation he has never experienced before．

No matter who will take on

Who takes on

Whoever will take on

Whoever takes on

Mothers holding jobs outside the home should have ________ schedules to make it easier to care for their children．

specific

smooth

flexible

concrete