单项选择题
A.calling B.call C.calls D.called
The car will be guided by a differential GPS system tha...
单项选择题The car will be guided by a differential GPS system that corrects errors（）in global positioning satellite signals.
A.arising B.rise C.raise D.arouse
However, since methanol-fueled vehicles could be design...
单项选择题However, since methanol-fueled vehicles could be designed to be much more（）than gasoline clone vehicles fueled with methanol, they would need comparatively less fuel.
A.effective B.efficient C.sufficient D.supplement
Methanol’s most attractive feature is that it can reduc...
单项选择题Methanol’s most attractive feature is that it can reduce（）about 90 percent the vehicle emissions.
A.of B.in C.on D.by
