二．单项选择（每小题1分，共10分）
21. I don’t want to take part _______ the English party.
A. to B. for C. in D. at
22. Julie’s father ________ to London last month. He ________ there three times.
A. went; had gone B. has gone; has been
C. went; has been D. has been; had gone
23. --- You seem to know much more about the city.
--- That’s true. I _______ it four times.
A. visited B. had visited C. have visited D. will visit
