281. Let"s not waste our time． 咱们别浪费时间了。

280. Jean is a blue-eyed girl． 珍是个蓝眼睛的女孩。

279. It"s too good to be true! 好得难以置信。

278. Is the cut still painful? 伤口还在痛吗?

277. I"m not used to drinking． 我不习惯喝酒。

276. I"m not sure I can do it． 恐怕这事我干不了。

275. I"ll just play it by ear． 我到时随机应变。

274. I walked across the park． 我穿过了公园。

273. I suppose you dance much． 我想你常常跳舞吧。

272. I heard some one laughing. 我听见有人在笑。