— Both David and his sister left school when they were only 11.— No wonder            of them is poor –educated.

In the end,he decided to send the sick child to hospital.

 —Must I sweep the floor now, Miss Jackson?—No, you __________. You can do your homework first.

This book _______ her 10 yuan, but I only ________ 5 yuan on the same one.

--Which T-shirt do you prefer? --The red one. It ____more comfortable.