Only when you have obtained sufficient data （ ） come to sound conclusion.

The whole class couldn’t help _____ when they saw the haircut of their new classmate.

There was nothing we could do _____ wait at that moment.

Our main concern is to _____ the living standard of the people.

Not until quite recently _____ any idea of what a guided rocket is like.

The Blacks are _____ people in the little town.

It is her beautiful eyes （ ） attract most of the fans.

_____ finished his work, he had to stay at home on the weekend.

If you are interested in this position, you can _____ to our personnel department for an interview.

If you suspect that illness might be serious， you should not （ ） going to the doctor.

The teacher’s lecture on American history was three hours long, and Mary felt very （ ）.

Don’t let the child play with scissors （ ） he cuts himself.