影响塔吊稳定的因素有风力、轨道坡度、平衡重及()等。
查看答案
A suitcase with shirt, trousers and shoes __________ stolen from the car
A. have been
B. has
C. was
D. are
They talked in whispers, but still, I couldn’t help but __________ their conversation
A. overhear
B. to overhear
C. overhearing
D. overheard
Not __________, with youth unemployment so high, some school – leavers with qualifications
A. obviously
B. surprisingly
C. particularly
D. normally
Not only are cars involved in most of the traffic accidents, but they also __________ .
A. contribute
B. promote
C. refer
D. matter