5、替换。完成21—40(共20小题,小题1分,共20分)21.What will happen to our human 100 years from now?A. 100 years ago B. 100 years before now C. since 100 years ago D. in 100 years22. Ilikethehat.Youlookreallycoolinit.A.verycoldB.notwarmC.goodD.notbad23.2.What'sthematterwithyourmother?A.wrongB.newC.goodD.trouble24.Hetak