A. that
Đáp án A
Giải thích: where thay cho cụm danh từ chỉ địa điểm phía trước “a big old farmhouse”, đằng sau còn là một mệnh đề hoàn chỉnh “three families live together”.
The classroom windows and sliding doors (5) ________ open to the outside most of the year. The roof is a big, wooden circle. Children love to play and run on it.
So for all of you lefties, leftie- loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help ________(35) an end to leftie discrimination once and for all