现学现用
1. You have not answered my question ______ I can join in the party tonight or not.
A. whether B. if
C. although D. because
2._______ you’re not satisfied with the life you’re living, don’t just complain. Do something about it.
A. If B. Whether
C. Since D. Unless
3. _______ they’ll go to the Summer Palace depends on the weather.
A. While B. If
C. Whether D. Though
