單項選擇-It’sdifficultforthevillagechildrentocrosstheriverf...

問題詳情：

單項選擇

-It’s difficult for the village children to cross the river for school.

      -I think a bridge(橋)______over the river.

       ld be built   being built  been built  built

【回答】

A

知識點：動詞語態

題型：選擇題