21. ______lecture is so inspiring that I dare say I have never had _____more instructive one.
A. A; the B. A; a C. The; a D. The; the
22. You can drive to work today. The roads ______be less crowded at this time.
A. may B. ought C. would D. should
23. He is appointed headmaster of our school and he is said to ___________his duties next week.
A. pick up B. take up C. hold up D. turn up
24. He had just finished his supper __________his father told him to get down to doing his homework.
A. when B. while C. after D. since
25. ____________with the beautiful scenery of Hainan, he decided to settle there immediately he graduated from school.
A. To impress B. Impressing C. Impressed D. To be impressed