Question

John ______(and/with) Mary were (in/at) home yesterday.

Answer 1

John and Mary were at home yesterday.
即用and, at 因为后面的谓语动词是were，显然主语是复数，即and连接的两个人，如果用with，表示伴随，主语只能是John，是单数。另外，在家是at home.

这道题出现在我的求助里，不然有这么多答了，我不会故意和他们撞题的。

希望能帮到你，祝更上一层楼O(∩_∩)O

Answer 2

and... at

因为后面的动词是were, 所以主语上2个人用and去连接： John and I, 如果用with，那么动词就要变成was
be at home 在家， 固定词组

Answer 3

John and Mary were at home yesterday
John和Mary昨天在家

Answer 4

and at
因为系动词是复数，所以用and。at home是固定搭配。