(   )1.—How long _____ you _____ here?

—For about two years so far.

A.have; studied                 B.did; live              C.do; stay             

(   )2.We have known each other _____ ten years ago.

A.for                               B. since                 C. ever

(   )3.There is _____ pollution in the world. We must stop it.

A.much too                      B.too many     C. too much

(   )4.—Is the flower beautiful?

—Yes, at _____ it’s _____ the one you bought for me.

A.last; as bad as        B.  last; not better   C.       least; no better than                    

(   )5.I can’t stand _____ for you so long.

A.to wait                          B.waiting               C.waits