一.单选题(20分)
( )1.Computers can do _____ calculations in a flash.
A. a million of B. two millions C. millions of D. million of
( )2.The house is so expensive that I cannot_____ it.
A.pay B.afford C.spend D.cost
( )3.Trees of this kind are common. You can see them ______.
( )1.Computers can do _____ calculations in a flash.
A. a million of B. two millions C. millions of D. million of
( )2.The house is so expensive that I cannot_____ it.
A.pay B.afford C.spend D.cost
( )3.Trees of this kind are common. You can see them ______.

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