4道英語選擇題的解釋（正確答案已給出,只需說出選那個答案的理由）
（B）___of people have never been there.
A,Three fourth B.Three-quarters C.Three-fourth D.Third-four
(B) Our life has greatly changed here since___.
A.the seventieth B.the seventies C.seventy years D.the past seventy
(A)There ___two minutes left.
A.are B.is C.have D.has
(B)There are ____in the garden.
A.a kind of flower B.all kinds of flowers C.a few kind of flowers D.a few kinds of flower
·請說出每道題為什么要選那個答案,越明白越好,我會給出相應(yīng)的追加分!