Was it because of the heavy snowstorm in Europe the flight had to be put off?A.w

Was it because of the heavy snowstorm in Europe ________ the flight had to be put off？

A.which

B.so

C.why

D.that

试题答案

D

考察强调句型。It is/was被强调成分that/who其他成分；这是强调句型的基本结构。本题强调的是介词短语because of the heavy snowstorm in Europe。故D正确。