What____these boxes______.A.did,make of B.were,making of C.are,made of D.was,made of
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What____theseboxes______.A.did,makeofB.were,makingofC.are,madeofD.was,madeofWhat____theseboxes______
What____these boxes______.A.did,make of B.were,making of C.are,made of D.was,made of
What____these boxes______.
A.did,make of B.were,making of C.are,made of D.was,made of
What____these boxes______.A.did,make of B.were,making of C.are,made of D.was,made of
C
be made of 由……制成
boxes说明是复数,排除D,要用be动词不用A,语态是被动,所以综合就是C
C
C这些盒子是什么做的