26) All the exam papers ____, the teacher sent the class home. A)having been handed in B)having hands in C) handing in   D) being handed in

熱心網(wǎng)友

A 現(xiàn)在分詞詞組完成時形態(tài)

熱心網(wǎng)友

A獨立主格

熱心網(wǎng)友

A.獨立主格結(jié)構(gòu)