( )9.He ------- be out because I saw him go into the house a

( )9.He _______ be out because I saw him go into the house a moment ago.A.may
3．汤姆病了，在医院住了两个星期。
Tom was ill.He was_______ _______ _______ two weeks.
4．他总是先人后己。
He always _______ _______ _______before himself.
5．如果你尽力的话，你就能在地理学科上就能取得好的分数。
If y ou _______your _______ ,you can_______ _______ _______ in Geography.
她刚刚熄灭了蜡烛去睡觉了。She _______ _______ the candle and _______ _______bed just now.
7．杰克的记性很好，但有时会粗心。
Jack has a _______ ______ _,but _______ he is _______.
8．我们都认为桑迪应该获得一个奖项。
We all _______ Sandy should _______ _______ _______.
9．他要去游泳，而不是踢足球。
He _______ _______ _______ instead of(而不是)playing football.
10．汤姆8岁时不会骑自行车。
Tom_______ _______ _______ _______when he was eight.
( )9.He _______ be out because I saw him go into the house a moment ago.
A.may not B.must C.can't D.mustn't