I( )the book twice before:A.read B.have readed C.have read D.readed
问题描述:
I( )the book twice before:A.read B.have readed C.have read D.readed
附带why
答
C..信号词TWICE.并且还是before之前的事情..所以是过去已经完成的事情 对现在造成的影响..很明显用现在完成时!