问题
选择题
—Is it that Jack often plays computer games makes his parents worry about him ?
—Yes , I think so .
A．what
B．when
C．that
D．which
答案
答案：C
考察强调句，强调句的特点是去掉it is that之后，句子完整，不缺少成分，即，that jack often plays computer gamesmakes his parents worry about him.