_____enough time and money, the researchers would have been able to discover more in this field.

The Clarks haven’t decided yet which hotel _____.

_____, he can now only watch it on TV at home. 

_____ no cause for alarm, the old man went back to his room.

In international matches, prestige is so important that the only thing that matters is to avoid _____.

_____ time, he’ll make a first-class tennis player.

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.