Children _____ to difficult situations are better at handling those _____ tasks.
| A.exposing; challenging; | B.exposed; challenged | 
| C.exposed; challenging | D.exposing; challenged | 
The more one is the English-speaking environment , the better he or she will learn the language .
| A.exposed to | B.filled in | C.caught on | D.kept up | 
—The paint on the doorhas to dry for another two days.
  —Yes. I doubt if the painters have read the directions.
| A.also; still | B.yet ; already | C.still ;yet | D.even ;yet | 
With all the magazines I needed,I left the post office.
| A.buying | B.to buy | C.bought | D.to be bought | 
Well,I think you’ve helped me .I must thank you all the same.
| A.now that | B.however | C.since | D.anyhow | 
There are several editions of English-English dictionaries here. I wonder if you want to buy 
.
| A.it | B.one | C.another | D.them |