They _ a movie _ sharks last week .A watched ,about B looked ,on C.see ,on D.watch ,about

选A
考点有两个 短语看电影watch a movie和过去时的用法.
last week 过去发生的事情,C,D不是过去式,直接排除.
看电影的短语用 watch不是look,look一般的用法为
look at sth 如：Look at that cat,it's so cute.看那只猫咪,好可爱.
或者look单独用于句子中,如：Look,there comes a bus.看,公车来了.
watch表示仔细的看,有欣赏的意思,看电影当然不是像look那样看一下就完了.
see强调看到了什么,是look 的结果,
如：After a few minutes,she finally saw the results.
几分钟后,她终于看到了结果.