21. During his US trip, _______Chinese Vice-President Xi Jinping put forward ______ four-point proposal on boosting Sino-US cooperative partnership.
A. a; a B. / ; the C. the; the D. / ; a
22. —Excuse me. Can you spare me a few minutes?
—_________?
A. What’s on B. What’s up C. What’s it D. Who are you
23. The driver had to send the book to his daughter which she had left at home , so he _________ at the school gate.
A．pulled through B．pulled up C．pulled out D．pulled down
24. — Can you give me the right answer?
— Sorry, I _____.Would you repeat that question?
A. hadn’t listened B. haven’t listened C. don’t listen D. wasn’t listening
25. Maybe if I _______ science, and not art then, I would be able to give you more help.
A. studied B .would study C. had studied D. was studying
