Chọn đáp án đúng

III . Chọn đáp án đúng :

1.They have studied ___ six o’clock.  a.for                b. at                 c.since                         d.to

2.My mother is____ tired___ cook dinner.   a.enough/ to     b.too/to            c.so/that           d.very/to

3.The new shopping mall is quite____ the present shopping mall.

a.different from b. the same    c.like to           d.similar

4.____ have you lived in this town?  For nearly 20 years   a.When b. How            c. How long    d.Where

5.She has___ over 30 pages since yesterday.   a.writen         b. wrote           c.written          d.write

6.Airmail is _____ expensive than surface mail.  a.the most             b.like               c. as                 d. more