读趣百科

This missile is designed so that once _____ nothing can be done to retrieve it.

He resented _____ to wait. He expected the minister _____ him at once.

He noticed the helicopter hovering over the field. Then to his astonishment, he saw a rope ladder _____ out and three men climbing down it.

The country’s chief exports are coal, cars and cotton goods, cars _____ the most important of these.

_____ regular training in nursing, she could hardly cope with the work at first.