He _______ a suggestion or two when he read a report from his men．
A.used to makingB.was used to makeC.would makeD.will make在线课程C
解析：
would+动词原形表示过去经常的习惯性行为，和used to+动词原形意义相近，但used to暗含现在已不如此。A中 used to应接动词原形；
B中was used to应用was used to+n．/pron．/-ing形式，选项D与句中时间关系不合。