Mark the letter A, B, C, or D on your answer sheet to indicate the correct one to complete each of the following sentences.
Trả lời câu hỏi dưới đây:
When you have a small child in the house, you ________ leave small objects lying around. Such objects ________ be swallowed, causing serious injury or even death.
- dùng "should" chỉ sự khuyên, gợi ý
- "must" chỉ sự yêu cầu, bắt buộc làm