-Look! A man is standing on his two hands.
-Yes. It seems he_____ for long.
A. practiced            
B. has practiced                
C. was practicing

B

解析試題分析：句意：--看!一個(gè)男士正在倒立。--是的，似乎他練了很長(zhǎng)時(shí)間了。根據(jù)語境可知這位男士從過去開始練習(xí)倒立一直到現(xiàn)在，所以應(yīng)該用現(xiàn)在完成時(shí)。故選B。
考點(diǎn)：考查動(dòng)詞時(shí)態(tài)。

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