___doesn’t seem to have been any difficulty solving the problem.

Teenagers are warned to be careful when making friends online, because when you can’t see a person, they could be __________.

Tom’s mother kept telling him that he should work harder, but ______ didn’t help.

There were many people standing by, but _____ of them were willing to help the poor boy.

Mrs. White managed to settle the quarrel between Lei and Rain without hurting the feelings of______．