碳是煤中发热量最高的物质。（）

What I have learned from this professor is of______value to my subsequent research.

A．indigestible

B．intolerable

C．incomprehensible

D．inestimable

A．For

B．In

C．On

D．To

A.At

B.On

C.With

D.During

听力原文：W: I have to turn my paper in late. I hope Professor Smith won't be too unhappy.

M: Well, this is the first time you've ever had to ask for an extension, so I don't expect she'll be too hard on you.

What does the man think Professor Smith will probably do？

A．Be understanding toward the woman.

B．Lower the woman's final grade.

C．Work hard to get an extension.

D．Expect the woman to finish her paper first.

M: Well, this is the first time you've ever had to ask for an extension, so I don't expect she'll be too hard on you.

Q: What does the man think Professor Smith will probably do？

(15)

A．Give the woman the failing grade.

B．Be understanding towards the woman.

C．Blame her for an extension.

D．Expect the woman to finish her paper first.

Professor Smith promised to look()my paper, that is, to read it carefully before the defense.

A. after

B. over

C. into

(23)

A．I haven't studied physics with Professor Smith.

B．This was Professor Smith's best lecture that I have ever heard.

C．I've never heard Professor Smith give a good lecture.

D．Professor Smith isn't interested in physics.

A、Dear Mr. Smith，

B、Dear Professor Smith,

C、My Darling Smith,

D、Dear Den Smith,