Choose A, B, C, or D to indicate the sentence which is the most correct.

When / their mother / came home / 10 o'clock last night, / they / not study; / they / chat.

Đáp án chính xác: When their mother came home at 10 o’clock last night, they weren’t studying; they were chatting.

Học sinh quan sát hình ảnh/ngữ cảnh và chọn đáp án đúng: When their mother came home at 10 o’clock last night, they weren’t studying; they were chatting..