What is the main topic of the passage?
A.Weather variations in the desert.
B.Adaptations of desert animals.
C.Diseased of desert animals.
D.Human use of desert animals.

The word "maintaining" is closest in meaning to _________.
A.measuring
B.inheriting
C.preserving
D.delaying

The author uses of Grant's gazelle as an example of __________ .
A.an animal with a low average temperature
B.an animal that is not as well adapted as the camel
C.a desert animal that can withstand high body temperatures
D.a desert animal with a constant body temperature

When is the internal temperature of a large desert mammal lower?
A.Just before sunrise
B.In the middle of the day
C.Just after sunset
D.Just after drinking

The word "tolerate" is closest in meaning to _________.
A.endure
B.replace
C.compensate
D.reduce

I like your new car. What _____ is it?
A.brand
B.name
C.label
D.make

It ______ able to finish it in an hour
A.couldn’t be too hard if you are
B.can’t have been too hard if you were
C.can’t have been too hard if you had been
D.couldn’t be too hard if you had been

_____ an emergency arise , call 911
A.Should
B.Can
C.Does
D.Will

Please look through these papers _____ your pleasure
A.on
B.in
C.for
D.at

Only in the last few days _____ to repair the swimming pool
A.anything has been done
B.has done anything
C.has anything been done
D.has there anything been done