If you ______ smoke, please go outside.

—May I do the rest of the work tomorrow?—Yes, of course. You        finish it today.

— What do you want to eat for lunch? I will prepare it earlier today. — You_____, mum. Let’s go out to have something different. 

—Why is online shopping getting more popular? —I think it _________ save a lot of time.

It is usually warm in Nanjing in spring. But sometimes it        be very cold.

It’s said that there are plenty of hotels in that town. There ____________ be any difficulty for you to find somewhere to stay.

—Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s office just now.

— The Queshi greenway has become a popular place for Shantou people on the weekends. — That’s right. And you ________ drive your car on it because it is a path for cycling and walking. 

—May I take photos in the museum? —No, you        . You       obey the rules here.

--Whose T-shirt is this? --It ____ be John’s. It’s ______ small for him. 

---Must I finish doing my homework now, Mum?    ---No, you ________.

--Would you like to visit Kun Ming by yourself this summer vocation? --I’m not sure. I _____go there with my parents because of the terrible thing at the railway station.

The Internet is really ________ to us. We can get a lot of things from it.

─ Is the woman in white our manager?  ─ It ________be her. She has just left for Shanghai. 

-Hello, _______ I speak to Lily? -Hold on, please.

---Mum, could I go shopping with you? --- Yes,________ . But you have to finish your homework first.

—Will you please answer the door? It ________ be your sister.—Sorry, I ________. I’m feeding the rabbit.

— __________ we leave the library before 5 o’clock?— No, you needn’t. You can stay here until 5:30. 

— Mum, can I watch TV now? — No, you             . It's too late.

—Is that boy Alan?—No, it ______ be him. He left for Beijing yesterday.