Question

Europeans always hold their fork in the left hand, ________Americans switch it between their left and right hands.

A．before	B．because
C．while	D．since

Answer 1

C

while意為“然而”，此處表示對照對比關系。句意：歐洲人總是用左手握叉子，但是美國人總是左右手交換著使用。before意為“在……之前”引導時間狀語從句；because引導原因狀語從句，意為“因為”；since意為“既然”引導原因狀語從句，意為“自從”引導時間狀語從句。