在较小的图形上绘制点画线、双点画线有困难时,可用粗实线代替。
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Lookat____ pictureaboutLondonUnderground,please.
A. a
B. the
C. /
D. on
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