I. Cho dạng đúng của động từ trong ngoặc để hoàn thành câu
1. She denies (know) …………………………. anything about the missing diamond.
2. Hundreds of thousands of people (kill) ……………………………. by the coronavirus so far.
3. When he was a boy, he (walk) ………………………… two kilometers to school every day.
4. He (play) ……………………… the guitar when I came to his house.
5. Be quiet! The teacher (deliver) ……………………………. the lecture.