请教几道托福听力题-->pumpkin转移

luocv

.M:Hey, Betty, you know I've been trying to get help with my physics. My friend recommended Gregory for a private tutor. Any thoughts?

W:Well, you could do a lot worse.Gregory's no slouch at physics,

Q:What is the woman's opinion of Gregory?

这里的Well, you could do a lot worse.Gregory's no slouch at physics,是什么意思？为什么选Gregory is very good at physics?

2.M:How many hours have we been here now? I'm falling asleep

W;About three and a half, but I swear we were here longer,

Q:What does the woman imply?

这里为什么选She thinks what they've been doing is boring.而不是选She doesn't believe she's been here for only three and a half hours.

3.M:I was going to ask Sandy to help me with these lab reports, but she seems to be always engaged.

W:Oh, that's because she's always on the internet. Why don't you come with me to Maurice's room?She and I go back a long way.

这里的She and I go back a long way什么意思？

4.M:My throat seems a little rough today. I'm wondering if I didn't catch something.

W:Well, I'm no nurse, but it doesn't sound so bad. Maybe you just need more water or perhaps it's all in your head.

这里 I'm wondering if I didn't catch something什么意思，还有perhaps it's all in your head.什么意思？

5.W:Now, I'm worried about the final. I got my midterm back and I thought I'd done better.

M:Well, you passed. That's better than what half of us got.

Q:What can be inferred from the conversation?

为什么这里选The man didn't pass the midterm而不选The midterm was very difficult

新手，请多多指教：）