Question

【题目】Magic shows are entertaining ______ the audience does not discover how the tricks are done.
A.so that
B.as long as
C.as if
D.ever since

Answer 1

【答案】B
【解析】句意：只要观众没有发现魔术表演是怎么做的，魔术表演就很有娱乐性。A. so that“以便”；B. as long as“只要”；C. as if“似乎”；D. ever since“从那时起",此处表示条件，故选B。