27.It is necessary that hethe task by the end of next week.

173.Shesome old photographs in a drawer.

172.Hethe test, but he wasn＇t careful enough.

171.The environment-friendly producta good example to other companies.

170.Fred used tolate with his roommates to play computer games.

169.The speech contest will give him an opportunity tohis talent.

168.The museum called in an expert toif the painting was a fake.

167.I havea new computer from the supplier.

166.The idea of working abroad reallyme.

165.The population of Africa isso rapidly as to cause concern of the whole world.

164.Many greatartists werenot famousin their owntime, and peopleonlystarted tothemmanyyears later.