基本信息
21. Of all the subjects, I like ______ physics best because it gives us ______ useful knowledge of things in science. And I long to turn ______ scientist in the future.
A. the ; a ; a B. / ; an ; / C./ ; a ; / D. the ; / ; /
22. If it were not for the fact Mary _______swim, I would take her to the island.
A. couldn’t B. shouldn’t C. can’t D. might not
23. Only when _______ possible to settle the problem.
A. does the editor come will it be B. the editor comes will it be
C. has the editor come it will be D. the editor comes it will be
