266.　 Sleep is _____________(必要)to one's health.

265.　 A fence at the back of the garden_______________(分开)us from the neighbors.

264.　 All countries, big or small, should be ______________(平等).

263.　 When I got home after the holiday there were a lot of _______________(留言)in my phone.

262.　 Don't _____________(浪费)your money on silly things.

261.　 There has been a 50% growth in the ______________(市场)for personal computers.

260.　 My office is on the _____________(第九)storey.

259.　 Don't be frightened by the television camera. Just speak__________(自然地).

258.　 A soldier's duty is to _______________(服从) orders.

257.　 (八)