Someone (knock) ______ at the door. Can you see who it is? Mn giúp mk vs ạ:3^^

Cách làm: Điền động từ thích hợp vào chỗ trống để hoàn thành câu.

Câu trả lời:
- Someone is knocking at the door. Can you see who it is?
- Someone knocks at the door. Can you see who it is?
- Someone has knocked at the door. Can you see who it is?

Cách làm:
Điền động từ "knock" vào chỗ trống trong câu trên để hoàn thành câu hoàn chỉnh. Đồng thời trả lời câu hỏi "Can you see who it is?"

Câu trả lời:
- Someone is knocking at the door. Can you see who it is?
- Someone knocked at the door. Can you see who it is?
- Someone has knocked at the door. Can you see who it is?

Someone will knock at the door. Can you see who it is?

Someone was knocking at the door. Can you see who it is?

Someone has been knocking at the door. Can you see who it is?