单选题 There has been the fear the world will become too crowded to accommodate so many People.( )

单选题 Primary school teachers have to find ways to keep school-children .( )

单选题 A teacher is expected to be patient to asks any questions after class.()

单选题 the policeman approaching ,the driver brought his car to a halt quickly.()

单选题 Most of those this book give a favorable review,making it more popular.( )

单选题 have been a disappointment to the family.l can't help but this time.( )

单选题 .By the roadside you can see a patch of rice field and dozens of houses . )

单选题 On rainy days ,people need to take care to avoid by muddy water.()