For many students, it’s easy_______ school.
—Can you answer this question? -- Sorry, I can _________ understand its meaning.
---Hurry up, _______ you will miss the exciting part of the film.
This book _______ be Li Lei’s. Look! Her name is on the cover.
---Do you know the man ________is wearing a black coat? —Yes, he is my uncle.
---have you stayed in Shanghai? ---For about two months.