語(yǔ)法

1._____ a necessary dimension for measuring astronomical^{1 space and the distance of heavenly bodies form the Earth.}

once in time

Time is

The time

It is time

2.Jackie Joyner-Kersee,_____ the world record in the heptathlon in the 1988Olympics,also won the long jump in the year.

whose setting

which she set

whoever set

who set

3.The fossilized remains^{2 of a type of camel _____ a dog have been found in the Bad Lands of South.}

no more large

no larger than

not larger

which no larger

4.Gorillas^{3 are quiet animals,_____ they are capable of making about 20different sounds.}

whether

which

even though

as well as

5.Although the Earth's chemical composition had been studied for years,only toward the end of the nineteenth century _____ as a discipline in its own right.

when geochemistry was recognized

was recognized as geochemistry

then recognized as geochemistry

as geochemistry was recognized

6.Because the wood of the dogwood tree is very hard,_____ is used for objects,such as roller skate wheels,in which hardness is desired.

and

it

what

thus

7.In hot,dry regions,the Sun's heat causes the outer layer of rocks _____,a process called exfoliation.

are expanded and peeled away

to expand and peel away

expands and peels away

they expand and peel away

8.The lower _____ in a room,the more slowly our eyes focus.

the level of lighting⁴

light level

leveling of light

lighting is level

9._____ Sarah Orne Jewett,a nineteenth-century writer,read widely in her family's extensive library.

That she received little education formally

The little formal education that she received

Little formal education that was received by

Although she received little formal education

10.In the early twentieth century,the Model Tautomobile was mass-produced and sold at a price _____ could afford.

the average person who

that the average person who

and the average person

the average person