Lookat____ pictureaboutLondonUnderground,please.
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Doyouknow _______ Line 5 Subway in Chengdu was put into use?
A. how
B. when
C. what
D. whenever
Asyouknow,metroinChinahasalso _______ rapidliyinrecentyears.
A. beendeveloping
B. bedeveloped
C. beendeveloped
D. developed
Youare ______contributeyourselftometroinChina.
A. supposeto
B. supposedto
C. besuppose
D. besupposedto
Canyoutellme ______thefunctionofAnAutomaticGateMachineis?
A. what
B. how
C. something
D. anything