—Kathy and her sister are so alike.—I can’t tell one from ____.
He asked Mary whether she had passed the exam ________.
More than _______ of the classmates in my class ____ fond of pop music.
She will tell us that each of us has a role ______ in making the earth a better place to live.
—How do you think he managed to improve his English in such a short time? —______ four hours on it every day.
In our ______,anyone ______ breaks the law should be punished.