Aeroplanes usually do not need to climb quickly or fly high in the polar region because __
A.they do not land there
B.there are no clouds at all
C.they can cross the ice with special equipment
D.it is very cold
A.they do not land there
B.there are no clouds at all
C.they can cross the ice with special equipment
D.it is very cold
A.industry
B.fabric
C.factory
D.workhouse
A.evolved
B.developed
C.involved
D.ascended
The first three aeroplanes of a new type______.
A.are used for testing purposes
B.are later broken up for spare parts
C.do not fly
D.are all destroyed
The airline flies aeroplanes to cities like Paris______.
A.day and night, right through the week
B.two or three times a week
C.at any time of the day, but not at night
D.right through the day, two or three times a week
It flies aeroplanes to towns and cities in Asia______.
A.at all times of the day and night
B.at all times right through the week
C.two or three times a week
D.day and night right through the week
Aeroplanes can climb quickly ______ 查看材料
A.in warm air
B.in cold air
C.when it reaches the polar region
D.only when the clouds are down low
It flies aeroplanes to towns and cities in Asia______.
A.at all time of the day and night
B.at all time right through the week
C.two or three times a week
D.day and night right through the week
The first three aeroplanes of a new type______.
A.are only for show
B.are all destroyed
C.are later broken up for spare parts
D.are used for testing purposes
Aeroplanes can climb quickly ______
A.in warm air
B.in cold air
C.when it reaches the polar region
D.only when the clouds are down low ______
A.Drive gas-guzzling vehicles.
B.Take aeroplanes to go on holiday.
C.Buy locally grown or produced fooD.
D.Drive cars as much as possibl
E.
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