______ you are middle school students, you should learn to how to look after yourselves.

He admitted that he had tried to _____ the shop during the night but had got stuck in the chimney.

What are you going to do this weekend—________If time permits，I may go to Shanghai with my friends

What do you think of Tom —He is ________ honest boy. He can play ________ piano very well.

The key _____ four modernizationslies _____ the science and education