In this section,we will briefly describe possible ways of re

In this section,we will briefly describe possible ways of reducing the costs and risks ------in dong this.
A.involving B.involved C.to involve D.being involved 为什么选B
How can they learn anything---- they spend all their time watching television?
A.when B.though C.while D.before 选A为什么不选C,有什么区别吗
More than 800000 Chinese overseas students have returned in the last five years,with the annual number ---- by an average rate of 36 percent each year.
A.growing B.grow C.to grow D.having been grown 为什么选A
The people in the Kiss Nightclub were trying to escape from the fire but were ----by smoke.
A.covered B.overcome C.arrested D.scared 选B啥意思
To be ------changing times you cannot have your body in the 21st century and your head back in the past. 选A不懂
A.in step with B.in front C.together D.apart from