“WeChat” really makes a great _____ to our life. More and more people use it now.

Could you teach me how to use the computer —___________.

Hellen set a good example ________ other mothers in demanding that children ________ enough time for sleep and play

It_______us many years to learn a foreign language （外语）well .

You’d better ______ your score and see if you have passed the exam.