21. “Smith, you are too old to wax the floor. You’d better have it ( ) by your grandson.” “Oh, it’s a good idea.” (A) waxed (B) waxing (C) being wax (D) wax

21.
“Smith, you are too old to wax the floor. You’d better have it ( ) by your grandson.” “Oh, it’s a good idea.”
(A) waxed
(B) waxing
(C) being wax
(D) wax

出自：郑州工程技术学院-大学英语（2）

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