尺寸公差是指______的变动量，在数值上即等于______极限尺寸（或______偏差)与______极限尺寸（或______偏差)

Keith's suspicion of embezzlement is based on the fact that

A．the Works Manager has made a mistake.

B．Holder and Bragg has acted dishonestly.

C．the Purchasing Manager has made a mistake.

D．more spare parts than needed have been used.

Mary ______ that the purchase had been a mistake. However, she didn't.

A．ought to acknowledged

B．ought to have acknowledged

C．should acknowledge

D．should be acknowledging

Mary ______ that the purchase had been a mistake. However, she didn't.

A．ought to acknowledged

B．ought to have acknowledged

C．should acknowledge

D．should be acknowledging

Mary ______ that the purchase had been a mistake. However, she didn't.

A．ought to acknowledged

B．ought to have acknowledged

C．should acknowledge

D．should be acknowledging

听力原文：W: John's been dismissed for stealing.

M: There must be some mistake.

Q: What can be concluded from the conversation？

(15)

A．John missed a test.

B．John has kept his job.

C．John has stolen a car.

D．John was called a thief.

听力原文：M: Alex has been dismissed for cheating on an important exam.

W: There must be some mistake.

Q: What does the woman mean？

(16)

A．She thinks Alex made mistakes in the exam.

B．She thinks Alex should be dismissed.

C．She doesn't believe Alex had cheated on the exam.

D．She doesn't believe Alex had been dismissed.

Jack said it had been foolish______me to make such a mistake.

A．of

B．for

C．to

D．with

A、must have

B、ought to be

C、should have been

D、could have been

A．mistake

B．correct

C．right

D．wrong

We believe him to______a mistake.

A．have made

B．be made

C．have been made

D．making