There might be life on other planets, but so far scientists haven’t found enough _____ to prove it.

At last, I should thank Mr. White for the _______ of speaking here and for ensuring me such an attentive audience. 

You have missed your______.You have to queue up there and wait for the next round.

The dentist gave me a shot which took ________ almost immediately and I didn't feel a thing.

Bill was doing a lot of physical exercise to build up his______.