15.His explanation was too difficult to understand and the children all became _____.得分：5分 A.confused B.confuse C.confusing D.to confuse

15.His explanation was too difficult to understand and the children all became _____.得分：5分
A.confused
B.confuse
C.confusing
D.to confuse

出自：河北民族师范学院-大学英语2

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