_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally.

Mum, it’s so hot and I am very thirty. —- Here’s the money, Tom. Go and buy _____ an ice ream.

Excuse me. Could you tell me to Xi’an Expo?–Take No.231 to get there.

The bus came and we_________.

The letter from parents makes David __________ blue.