— I think English is __________ unimportant subject.
— I don’t think so. It is __________ useful tool when we talk with foreigners.
| A．a; an | B．an; a | C．a; a | D．an; an |
相关试题
— Would you like some.
— Oh, yes, just a little.
| A． milk | B． apple | C． pears | D． oranges |
Which of the following signs can be seen on the door of a shopping mall?
A B C D
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