---Volunteering is becoming           popular in China .--- Yeah, people are now aware that helping others is helping themselves.

Professor White has written some short stories, but he is________known for his plays. 

As is known to all language learners, the newly learnt words will soon be forgotten unless they are _______ used in everyday communication.

---- Have you finished your experiment report, Jane?----- Oh, my God. I’ve _______ forgotten all about that.

To tell the truth, his pronunciation is ___________ terrible.