Question

【题目】Earthquakes always happen, so it is difficult to know when they come.
A.hopefully
B.suddenly
C.usually
D.luckily

Answer 1

【答案】B
【解析】句意:地震总是突然发生，因此要知道什么时候发生灾难。A.希望地:B.突然地;C. 通常地;D.幸运地。由后句so it is difficult to know when they come.难以知道何时发生。可以推测出其发生突然。故选B。