That is the reason _____I refused it.
A. why B. for that C. because D. which
The tables and pictures help make ________ clear ________I wasn't sure of before.
A. it; for me to understand what B. it; everything
C. everything; to understand what D. /; what
really matters is not whether you succeed or not，but rather whether you’11 try or not.
A. What B. Whether C. If D. Which
—The experiment is of particular importance.
—I see. We will carry on with it ________ we can get enough money.
A. unless B. though C. whether D. until
This is the very film ___________ I have long wished to see.
A. which B. that C. who D. whom
The reason _______ he explained to us was quite simple.
A. why B. that C. how D. when
