21. To his delight, Tom quickly earned the trust of his girl friend and then _____ of her parents.

A. one                      B. ones                         C. that                          D. those

22. --- Talking of travel, have you ever been to Chicago?

--- Yes. I _____ it twice while I was working in the US.

A. have visited          B. visited                      C. was visiting                     D. would visit

23. --- Catherine, will you visit us this weekend?--- I planned to, but something unexpected _____.

A. has come up          B. was coming up          C. had come up             D. would come up

24. Scotland voted against independence£»more than half of the people chose _____ part of the United Kingdom.

A. remaining             B. remained                  C. to have remained      D. to remain

25. --- Bob, could I use your computer this evening?--- Sorry. I _____ a report on it then.

A. will be writing      B. have been writing     C. have written             D. will have written