单项选择题
A.close their stores B.resort to legal action C.take on a strike D.take some violent actions
A.Because they have exceeded the EU quota limits. B.Because they are poor in quality. C.Because they are very expensive. D.Because they are old-fashione
A.develop a new spaceship B.enlarge its research field C.send astronauts to the moon D.cut down its expenses in space research