In some areas China is _____ the developed countries,but it will take some yeats before we can catch up with them.

In some areas China is _____ the developed countries,but it will take some yeats before we can catch up with them.
A.\x05Growing into
B.\x05Whipping up
C.\x05Gaining on
D.\x05Heading for
The increased volume of scheduled flights during the weeklong holidays is _______ the air traffic control system.
A.\x05Tilting
B.\x05Streaming
C.\x05Straining
D.\x05Abolishing
这题完全看不懂.
We think it is wrong to single out any ________ of society for Aids testing
A.\x05Spectrum
B.\x05Section
C.\x05Mixture
D.\x05Locality
这题怎么翻译怎么说来着?
What they have done is _____ two different types of entertainment ,the cirus and the rock concert.
A.\x05dispose
B.\x05accord
C.\x05adopt
D.\x05fuse
这题为什么选D?