成人英语三级考试

【单选题】It is on (each) individual effort (which) the safety and happiness of (the whole) (depend).
A．each
B．which
C．the whole
D．depend

网考网参考答案：B
网考网解析：
[解析] 应改为that。本句为强调句，正确结构应该是：“It is... that... ”。所以which应该改为that。 查看试题解析出处>>