The weather was very nice. They (go) …………………. on a picnic.

Cách làm:
- Xác định dạng của câu: This is a simple past tense question
- Tìm dấu hiệu để chia động từ: The weather was very nice, dùng was là dấu hiệu của simple past
- Chia động từ: go -> went

Câu trả lời:
- They went on a picnic.

They had gone on a picnic.

They were going on a picnic.

They have gone on a picnic.

They are going on a picnic.