19.We are talking about 　　　　　we should give more help.

　　　 A.who　　　　　　　 B.that　　　　　 C.whose　　　　　　　 D.whom

18.Air,or　　　　　 is called the atmosphere (天气),surrounds the whole world.

　　　 A.that　　　　　　 B.which　　　　 C.what　　　　　　　 D.it

17.We all know the truth　　　　　 there is air,water and sunlight there are

　living things.

　　　 A.wherever　　　 　　B.that　　　　　 C.where　　　　　　　 D.that wherever

16.Do you know　　 　　　?

　　　 A.whose wallet is this　　　　　　 B.whose wallet this is

　　　 C.whose is this wallet　　　　　　 D.whose this is wallet

15.The question is　　　　　 to land on the grassland.

　　　 A.if it is safe　　　　　　　　　　 B.if is it safe

　　　 C.whether is it safe　　　　　　　 D.whether it is safe

14.　　　　　 　is to dance.

　　　 A.That interest me really　　　　　 B.Which really interests me

　　　 C.What really interests me　　　　 D.What really interest me

13.　　　　　 　we can't get seems better than　　　　　 we have.

　　　 A.What,what　　　 B.What,that　　　 C.That;that　　　　 D.That;what

12.Last month he made a promise　　　　　 he was free he would take me to Beijing.

　　　 A.if　　　　　　　 B.that　　　　　 C.that if　　　　　 D.whether

11.It is generally considered unwise to give a child　 　　　　he or she wants.

　　　 A.however　　　　 B.whichever　　　 C.whatever　　　　　 D.whenever

10.I think it possible　　　　　 they will be able to solve the problem.

　　　 A.for　　　　　　 B.that　　　　　 C.when　　　　　　　 D.how