3.She didn't look happy but glared at him as she moved round the customers.

Glare at 怒视，带有敌意

Eg. "How could you do that？"he said, glaring at his mother.

Glance at 扫视

Eg.He glanced at his watch and left in a hurry.

Stare at 张大眼睛死死地盯着

Eg.She stared at him in surprise.

4.Yong Hui agreed to stay and soon they were both enjoying the dumplings, fatty pork and cola.

Agree to (do) sth. 表示"同意某事或某建议"，后只能跟表"提议，计划，方案，打算，安排"的名词。

Eg.He agreed to their proposal.

He agreed to get someone to help us.

Agree with sb. 同意某人

Eg.I agree with every word you said.

Agree on sth. 表示在某事上取得一致的意见

Eg.They agreed on a date for the next meeting.

5.But don't you think it would be better if you were a bit thinner?

虚拟语气，表示与现在事实相反的假设时，条件状语从句的谓语动词用过去式（be用were），而主句的谓语动词用would(should, could ,might)+动词原形。例如：

If I were you, I should study English better.

If he had time, he would attend the meeting.

6.My research has shown me that neither your restaurant nor mine offers a balanced diet.

Neither...nor 既不...也不...

1）引导并列主语时，谓语的数于最靠近谓语的主语保持一致