【题目】I wasn’t sure if he was really interested or if he polite.
A. was just being B. will just be
C. had just been D. would just be
在线课程【答案】A
【解析】考查动词时态。句意：我不敢确定他是真的感兴趣还是仅仅是在表示一下礼貌。本题考查时态。由前文I wasn’t sure if he was…及并列连词or来判断，此处应为过去时，故排除B项；本句并不表示“过去的过去”，也不表达“过去的将来”，故排除C、D两项；本句表示暂时的情况，故用过去进行时态。