1.Several new underground lines______to welcome the World Expo in Shanghai recently.A.have been built B .were built C.are built D.will be built2.We______eight English songs in the hobby group by the end of last monthA.have learned B.learned C.had lea
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1.Several new underground lines______to welcome the World Expo in Shanghai recently.A.have been built B .were built C.are built D.will be built2.We______eight English songs in the hobby group by the end of last monthA.have learned B.learned C.had lea
1.Several new underground lines______to welcome the World Expo in Shanghai recently.
A.have been built B .were built C.are built D.will be built
2.We______eight English songs in the hobby group by the end of last month
A.have learned B.learned C.had learned D.would learn
要答案还有原因
1.Several new underground lines______to welcome the World Expo in Shanghai recently.A.have been built B .were built C.are built D.will be built2.We______eight English songs in the hobby group by the end of last monthA.have learned B.learned C.had lea
A
recently 是现在完成时的标志,所以要用have +过去分词
其次,这个句子主语是物,要用被动语态.
所以选A
C
by+表示时间的词就是完成时的标志.
by+将来的时间就是将来完成时
by now就是现在完成时
by+过去的时间就是过去完成时
所以,by the end of last month就是过去完成时的标志.选C