—Can you give me some advice on what I said just now?
—Sorry, my mind _____．
A． has wondered B． had wondered C． is wondering D． was wondering
I’d appreciate _____ if you would like to teach me how to use the computer．
A． that B． this C． it D． you
The government has to close those small factories to prevent the water of the river ______.
A. polluting B. from polluting C. being polluted D. polluted
There are _____ products to be sold in the factory store. Which of the following is not correct?
A. a large number of B. a large amount of C. quantities of D. a great many
He did not regret saying what he did but felt that he _____ it differently.
A. could express B. would express
C. could have expressed D. must have expressed
--Excuse me,_________? --That’s ￡200 altogether, sir.
A. what does it cost B. is it the right amount
C. could I have the bill D. can I place an order
