---Have you heard of Nanjing?--- Of course. It is famous_______ its beauty of nature______ the host city of the 2014YOG.
The teacher was very pleased_______ Tony’s answer.
I think playing basketball is_______ dangerous than swimming.
You need_______ your homework this afternoon.
—How about watching TV at home? —It’s too _______.Let’s play football.
Betty often helps me __________ my English after class.