.Water and air are _______ to human beings. We can

.Water and air are _______ to human beings. We can not live without them.

A.harbour B.function C.definite D.essential

您可能感兴趣的试题

______ we need air and water, so we need criticism and self－criticism.A．Even thoughB．So lo

答案解析
Food packages, bottles and tins for drinks can cause ______.A．air and water pollutionB．bot

答案解析
Weve arranged to go to the cinema on Wednesday, but we can be______and go another day if n

答案解析
We can t emphasize ______ the importance of air and water for the survival of all species.

答案解析
We are happy to see that John and Sally can______ with all their problems cheerfully.A．tac

答案解析
We have made up laws to protect the water from being polluted and the animals _____

答案解析
We have arranged to go to the cinema on Friday but we can be ______ and go another day.A.

答案解析