几道选择题,我想知道下原因1.the lecturer's humor was ___make every attend

几道选择题,我想知道下原因
1.the lecturer's humor was ___make every attendant burst into laughter.
A.so as to B.such as to C.such that D.such as
（为何选B?）
2._______ they developed many of the plants including types of corn, potatoes, tomatoes, squash, beans, and peppers we eat today?
A. When do you suppose B. when do you suppose that
3.____abroad for a tour can be a worthwhile experience to a senior high student.
A.taking B.being taken
4.information obtained from libraries is sooner forgotten than ___from life .
A.it B.that C.what D.one