单项选择题
A. makes use of microwaves B. measures the movements of a spaceship by means of light beam C. makes use of sound waves D. Both A and B
No matter how hard he worked, ()A. he could not do any ...
单项选择题No matter how hard he worked, ()
A. he could not do any better B. and he could not do any better C. so he could not do any better D. but he could not do any better
They have two teams, and () have a good chance of winni...
单项选择题They have two teams, and () have a good chance of winning.
A. all B. either C. both D. each
He is sitting () of the car with the driver.A. in front...
单项选择题He is sitting () of the car with the driver.
A. in front B. in the front C. on the front D. front
