Do you think yesterday’s math problems were difficult—Yes. I could ________ work them out.

The manager needs an assistant that he can _____ to take care of problems in his absence.

Which song do you like better, Lucy—I prefer the song Little Apple________ can attract many people.

In order to help the police ，the witness described what he had seen very carefully not to ______ any detail.

The children are made ______ lots of homework every day．This makes them ______．