----May I listen to the music here, Mr. White?
 ----Sorry , you’d better ____ it like that..
| A.not to do | B.not do | C.don’t do | D.not do so | 
There was a heavy curtain ________ the light.
| A.blocking out | B.preventing from | C.blocking in | D.taking off | 
. These old buildings possibly __________ the Ming Dynasty.
| A.dated back to | B.date back to | C.date back | D.are dated back to | 
The government announced that six highways by the end of last year.
| A.built | B.had built | C.have been built | D.had been built | 
With his eyes _______ on me, he came towards me.
| A.fixed | B.fixing | C.to fix | D.were fixed | 
Humans are destroying nature day by day, _____of course, will cause punishment sooner or later.
| A.who | B.which | C.it | D.that |