Air, ________ we breathe every day, is around us all the time．

that

which

from which

from that

In the office I never seem to have time until after 5∶30 p. m., ________ many people have got home．

whose time

that

on which

by which

Recently I bought an ancient Chinese vase, ________ was very reasonable．

which price

the price of which

its price

the price of whose

She heard a terrible noise, ________ brought her heart into her mouth．

it

which

this

that

He is a man of rich experience, ________ much can be learned．

who

it

from whom

from which

He got well-prepared for the job interview, for he couldn’t risk ________ the good opportunity．

to lose

losing

to be lost

being lost

In order to make our city green, ________．

it is necessary to have planted more trees

many more trees need to plant

our city needs more trees

we must plant more trees

She is ________ to leave as soon as possible．

hurried

anxious

worried

nervous

Parents in the US and China ________ greatly in their way of educating their children．

different from

are different from

differ

are differed

Don’t keep the medicine ________ the children’s reach．

in

within

out of

beyond