20.------ Would you like a cup of tea?

　 ------ ________.

A. Yes, I like some　　　　　　　　 　B. Yes, I’d like

C. Yes, I hope　　　　　　　　　　 　D. Yes, thanks

19.The students are told great _____ should be made of their dictionaries to study English well.

A. value　　　　　 　 B. cost　　　　 　　　　 　C. use　　　　 D. matter

18._______ get to the station in time, we set off early.

A. So as to　　　　 　B. So that　　　　 　C. In order to　 　D. In order that

17. Once _______, the song will never be forgotten.

A. it heard　　　 　　 B. hearing　　　 　　 　C. heard　　　 　D. to hear