30.“对影成三人”中的“三人”指的是( )、( )和诗人自己。

178. Bob never does his homework()Mary does. He makes lots if mistakes.

177. She looks ()than before.

176. ()amazing the film is!

175 .()unforgettable experience it is planting trees on a hill!

174 .()it()when you left the library.

173. Finally，I opened the door ()the key.

172. The news()really great.

171. I often walk around the lake()dinner.

170. There()a pair of shoes，a T-shirt and a bag on the ground now.

169.Although she is under great stress， () she always wears a smile on her face.