9. ()，难于()!

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

198.There are many birds singing ()the trees.

197.They talked ()low voices in order not to be heard.

196. John() in the exam because he got only 45 points.

195. We are looking forward ()you.

194.Let’s drink ()Dicks’ success in business.

193.Take it (). It is nothing but a joke.

192. Our hometown is becoming().

191.-- Health is money.
-- But I think it is ()money.

190.His parents wouldn’t let him marry anyone () family was poor.