We didn't go on picnic because it was raining heavily. => It was
We didn't go on picnic because it was raining heavily.
=> It was ________________________________________.
Đáp án: It was raining heavily so we didn't go on picnic.
Giải thích: Cấu trúc với so: S + V + so + S + V: diễn tả kết quả
Dịch: Trời mưa to nên chúng tôi không đi dã ngoại.