3道高中英语单选.
1.
There A a trend that 3D films will become more popular ever since the film Avatar hit the market．
A．has arisen B．arose C．is arising D．will arise
2.—You didn’t take the high-speed train with the leading letter "G" to Shanghai?
— D .I still took the "D" train,which saved me more than 50 yuan．
A．Yes,I didn't B．No,I did
C．Yes,I did D．No,I didn't
3.
Our government has taken some measures to overcome the lack of electricity,but it may take some time ___D__ we have enough power．
A．since B．after C．unless D．before