问题
选择题
Was it because of the heavy snowstorm in Europe _______ the flight had to be put off ?
A．which
B．so
C．why
D．that
答案
答案：D
考查强调句型。此处because of the heavy snowstorm in Europe是被强调的部分，原语序为：The flight had to be put off because of the heavy snowstorm in Europe.