课时作业(十七) 必修3 unit 9 wheels
ⅰ.单项填空
1.—would it be harmful for my dog to change its food?
—________.you should turn to professionals.
a.that’s right b.of course
c.i’m not so sure d.i’m afraid not
2.the dictionary will cover the changes that have taken________place since________original version was first published in 1988.
a.the;a b.the;the
c./;a d./;the
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