问题补充：
------I didn’t go to the party my homework last night.
------Oh!
A. because, What a pity!
B. because of, What a shame!
C. because, I’m sorry to hear that.
D. because of, That’s right.
答案：
A. because, What a pity!
(答案→)B. because of, What a shame!
C. because, I’m sorry to hear that.
D. because of, That’s right.
解析：because后加从句，because of后加代词/名词/动词的ing形式。
