Jack__be in class yesterday.A.didn't B.couldn't 选哪个?为什么?

Jack__be in class yesterday.A.didn't B.couldn't 选哪个?为什么? （）John didn't climbed a mountain yesterday ---- A ------- B —I didn't take notes in class yesterday because i had lost m She ______ the homework yesterday.A.didn't do B.didn't C.doe I didn't come to class yesterday because i 选哪个 he had better stay here._________he?a.didn't b.don't c.h The car__much money.A isn't cost B didn't cost选哪个怎么解释 I didn't go shopping yesterday.He didn't____ A:either B:neit You must have seen him off yesterday,A.haven't you B didn't I ____come yesterday, but I couldn’t. A. was to have B. must i ___come yesterday,but i couldn't A.was to have B.must C.ou didn't 和couldn't的区别,