I want you to ______________. I'm sorry, and I forgive you.[音频]（来源：美剧《童话镇》）
A. ignore my last message
B. remember my last message
查看答案
What do we know about Heather's mother?
A. She doesn't know why she should come.
B. She has been planning to come.
What can we infer from Heather's mom's words?
A. People will know Heather's illness soon or later.
B. Heather doesn't want to accept chemo.
Why does Heather's mother hope that the secret can be kept a little longer?
A. Because she doesn't want Heather to feel lonely all the time.
Because she doesn't want others to pay special attention to Heather.
当总效用达到极大值时，边际效用( )。
A. 达到最小
B. 达到最大
C. 为零
D. 为正
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