问答题 Thousand（A）of children are dying of（B）drinking unclean water every day（C）in the developing（D）world.

问答题 I should（A） tell you that you will（B） find it hard to make friend with（C）that young（D）man.

判断题 Three pencils cost the same as two erasers.Four erasers cost the same as one ruler.Therefore，pencils are more expensive than rulers.（）