You will not remember the facts _____ you understand them all.

A. if
B. unless
C. if not
D. because
相關(guān)習(xí)題

科目:初中英語 來源:期末題 題型:單選題

You will not remember the facts _____ you understand them all.
[     ]
A. if
B. unless
C. if not
D. because

查看答案和解析>>


同步練習(xí)冊答案