In my opinion,it is not so helpful to give someone some bread as it is important to teach him how to________.
It was a time_______ the killer whales helped the whalers catch the baleen whales.
Ladies and gentlemen, please remain ______ until the plane has come to a complete stop.
_______ a certain doubt among the people as to the practical value of the project.
The how-to book can be of help to ______ wants to do the job.
---Is Bob still performing? --- I’m afraid not. He is said _____ the stage already as he has become an official.