where is sam?Do you know?Look!He is _____on the beach.A.swimming B.lying C.looking D.having 选啥
问题描述：
where is sam?Do you know?Look!He is _____on the beach.A.swimming B.lying C.looking D.having 选啥
答
选b呀,look是现在进行时的标志,且lying on the beach是一般的搭配