Question

The problem is ________ sometimes when we are given something on a constant basis, we start to take them for granted and forget being thankful for what we already have.

A．that	B．how
C．where	D．which

Answer 1

A

A 考察名詞性從句。主語是The problem，is是系動詞，后面接表語從句。從句中有包含有when引導的時間狀語從句，由于從句句意通順，成分完整，應該使用that引導，that不充當成分，只做引導詞。故A正確。