Unit10 SectionB 2b 课文知识训练
1. You can’t pass the exam ______ you study hard.
A. if B. when C. unless D. because
2. After trying many times, we were successful ______.
A. at the end B. to the end
C. in the end D. end of
3.—Who ______ went to the park?
—Tom and Linda.
A. else B. other C. another D. the other
4. Teenagers should learn to protect _______ from all kinds of danger.
