Generally, you should avoid（)business over a meal until your host gives a signal.

A.That's all fight.

B.You shoul

C.No, I'm not her

A.May

B.Must

C.Shoul

D.would

听力原文：Is check ok？

(A) Yes, the condition of this machine is very good.

(B) Yes, we should check if everything is Ok.

(C) Yes, you can use it.

(23)

A．

B．

C．

A.could

B.would

C.shoul

D.might

I'd rather you _______anything about the garden until the weather improves.

A、shouldn't do

B、didn't do

C、mustn't do

D、oughtn't to do

A.A. shouldn't

B.B. needn't

C.C. mustn't

D.D. can't

I think it ______ high time they ______ to take you more seriously.

A．was, began

B．is, should begin

C．should be, begin

D．is, began

The Arabidopsis thaliana calcineurin B-like protein 1-15 (CBL1-15) protein sequences should be downloaded from the NCBI website. And you should export the sequences in the fast format and print it. The first three of the student number do CBL1, No. 4-6 doing CBL2, No. 7-9 doing CBL3, and so on.

A.would

B.can

C.shoul

D.may

A.can

B.may

C.shoul

D.must

The fifth paragraph warns that the intended reader

A．may not agree with you about who should read your report.

B．may not think that your report is of any value.

C．may not accept a report that is submitted late.

D．may not read through your report in full.