Never lose heart. I believe you will make a ________this term as long as you are more hard-working.

The young lady _____is interviewing Lin Zhixuan about the program I am a singer is from 21st Century Talent Net.

There is ______ English book on the teacher’s desk.

Why are the tax collectors so busy? —Many people prefer to have their tax forms completed by a professional rather than ___.

He____know the answer, but I’m not sure.