–Look at that girl! Is it Susan? --No, it _______ be her. She has gone back to her hometown.
It’s important ____the piano well.
The _____you work , the _____grades you will get.
The teacher was very pleased _____ Tony’s answer.
There are some new words on the blackboard. Please _____ in your exercise books.
The English book is easy for Tom because there are _____few new words in it.