crankcase lubricating oil pump
fuel oil pump
air compressor
auxiliary blower
第1题：
A.half an hours
B.half a hour’s
C.half an hour’s
D.half a hours’
第2题：
It took him half an hour to do his homework．（改为同义句）
He__________ half an hour__________ his homework．
第3题：
我们每天应该读至少半小时的英语。
We should read English for________ ________ ，half an hour every day．
第4题：
After walking hurriedly for half an hour, I wanted to drink （）
Asomething cold
Bcold something
Csomething with cold
Dsomething to be cold
第5题：
第6题：
A.one and a half hour’s
B.one and a half hour
C.an hour and a half’s
D.an hour’s and a half
第7题：
The external flotation bladder on an immersion suit should be inflated ______.
A.before you enter the water
B.after you enter the water
C.after one hour in the water
D.after you notice that your suit is losing buoyancy
第8题：
A、an half hour’s
B、half an hour
C、half an hour’s
D、half a hour’s
第9题：
Yesterday we had （） talk.
Aone and a half hour’s
Bone and a half hour
Can hour and a half’s
Dan hour’s and a half
第10题：
–How long does the bus?-（）About half an hour.
Aspend
Btake
Cuse