the suction stroke
the compression stroke
the expansion stroke
the exhaust stroke
第1题:
We should never ______ today's work till tomorrow.
A、put on
B、put off
C、put away
D、put up
第2题:
A.has been put
B.have been put
C.being put in
D.to.be put in
第3题:
A. put up
B. put aside
C. put off
D. put on
第4题:
第5题:
The students’ phone offers its service_______
A.every morning during the work-days
B.every morning during the work—ends
C.four mornings a week
D.every other morning except Sunday
第6题:
A、being accepted
B、being received
C、being admired
D、being admitted
第7题:
The project requires more labor than ________.
[A] has been put in
[B] have been put in
[C] being put in
[D] to be put in
第8题:
In Britain we try not to put our hands _____ during a meal .
A. on the desk
B. in the bed
C. on the table
D. in the pocket
第9题:
第10题: