The pressure ________ causes Americans to be energetic, but it also puts them under
A. to compete
B. competing
C. to be competed
D. having competed
查看答案
The rapid development of communications technology is transforming the ________ in
A. route
B. transmission
C. vision
D. manner
He is assigned to oversee the production of the assembly lines.
A. supervise B) watch C)suspect D)predict
微信支付 
支付宝支付