问题

_____earth scientists understand how and why earthquakes happen, forecasts are usually inaccurate.[ ]

A: As
B: While
C: Because
D: If

正确答案是：

同类题型

While in London, we paid a visit to the hospital founded ______ the nurse Florence Nightingale.

How can the government _______ the wishes of its people?

下列各句中，加横线词的活用情况和其它三项不同的一项是（）

Our English teacher _____ in the office because she has gone to America.

e class time, our teacher has________ students do half of the exercise in class and complete the other halffor homework. .