Professor Li ________ be in Beijing because I saw him in town only a few minutes ago.

[　　]

--Are you coming to Jeff's party?

--I'm not sure. I ________ go to the concert instead.

[　　]

--I didn't attend the meeting because my car was broken.

--You ________ mine. I wasn't using it.

[　　]

A．could borrow

B．could have borrowed

C．may borrow

D．may have borrowed

--We were not sure which way to go. In the end we turned right.

--You ________ the wrong way. You ________ left.

[　　]

A．had gone; must have turned

B．went; must turn

C．have gone; would have turned

D．went; should have turned

--I think you might have got drunk at the party.

--Well. I ________.

[　　]

At the moment she ________ the long letter to the visiting professor at the office, I suppose.

[　　]

A．may type

B．may be typing

C．can have typed

D．must be typing

I was going to see him anyway ________ sleeplessness.

[　　]

They found the woman ________.

[　　]

A．hard to work

B．hard to work with

C．hard working

D．hard working with

--Was the job difficult?

--Yes, we found ________

[　　]

A．the work hard for doing

B．hard to do the work

C．it hard for doing the work

D．the work hard to do

These problems you've just mentioned are ________ .

[　　]

A．difficult to understand it

B．easy enough to understand it

C．too difficult to understand

D．too easy to be understood