Rainforests ___ an burned at such a speed that they will disappear form the earth in the near futurA.cutB.are cutC.are being cut D.had been cut

Rainforests ___ an burned at such a speed that they will disappear form the earth in the near futurA.cutB.are cutC.are being cut D.had been cut There are ___ rainforests than before.A.more B.less C.fewer D.fewwhich____,the plane or the train?A.go more quickly B.goes more quickly C.goes more quicker go D.go more quick what are you doing?I'm ___ the school life.A.think over B.think obout C.thi 填空 A:Is that an apple?B：___,___ ___.Please ___ ___.A:Is that an eraser?B:Yes.兄弟们帮帮忙 The rainforests can give us many ____things.A.use B.used C.useful It's ____orange.It's ___ yellow orangeA:a;an B:an;the C:an;a D:an;an a,an的用法,( )There's___h,___o,___u,and___rin the word hour.A.a,an,an,a B.an,an,a,an C.an,an,an,a D.a,an,a,a I like ___.A.oranges B.orange c.an orange ___ an interesting dolphin it is .A.What B.How There is ___ h,____ O,_____ u_____ and_____ r in ____ word hour.A.a an a an the B.an an an an a C.an an a an the D.a an an an a They gave no indication of an appreciation of the range of ways in which rainforests are important.the range of ways in which rainforests are important变回正常非定语从句顺序是rainforests are important in the range of ways,请解释in the —Is this ___ English car — No,it’s ___ Japanese car.A.a; a B.a; an C.an; an D.an; a it's ()for us ()rainforests well Abad ,to protect B good,to protect C important,to protecting急 ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D.A;an___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D.A;an答案给的是B,为什么不能第一个空不能填The?还有到如何判断u开头的字母到底是an还是a? IN the word ruler,I see ___uand___e A an;a B a;an C an;an D the;an 17.Xi'an is ___ old city with ___ long history,isn't it?A.a,an B.an,a C.the,the D.the,a It is ___ f A .a B.an C.the D./It is ___ fA .a B.an C.the D./ My friends have got an aunt.（ an 划线提问) ___ ___ ___ ___ your friends ___? ---What color is ___ orange?---It's ___ orange.A.AN,AN B.AN,THE C.AN / D./,AN我们正在复习,可是就是不太确定,希望你们告诉我.