Last month, part of Southeast Asia was struck by floods, from_____effects the people are still suffering.
A. that B. whose
C. those D. what
The book was written in 1946, _________the education system has witnessed great changes.
A. when B. during which
C. since then D. since when
Those successful deaf dancers think that dancing is an activity____sight matters more than hearing．
A. when B. whose
C. which D. where
We shouldn't spent our money testing so many people, most of_________are healthy.
A. that B. which
C .what D. whom
It is reported that two schools,_____are being built in my hometown, will open next year.
A. they both B. which both
C. both of them D. both of which
____is often the case, we have worked out the production plan.
A. Which B. When
C. What D. As
