Is a hunderd dollars enough 为什么用IS,可否用Will be?

Is a hunderd dollars enough 为什么用IS,可否用Will be? It is not yet a hunderd years old.它的前面一句是：Basketball is still a young game.It is not yet a hunderd years old. A plan is [ ] faster than a bike.A;hunderds of timeB;hunderd of timeC;hunderds of timesD;hunderd tim必须有理由 The hotel is across( )the post office 8 hunderd meters away( )our school.选项：A:between ; from B:behind :toC:from ;from D:to ；of 哪里有错?That is a 15 dollars fine. This watch is 100 dollars.It’s a good p_________. the r() for the apartment is 120 dollars a month The r------ for the apartment is 120 dollars a month “Is five dollars a big sum to him?”为什么要用is?five dollars不是表示复数吗? 谁帮我造下原问句啊A glass of milk shake is 80 dollars 画线部份 _______80 dollars 那里 能帮我造下原问句吗A glass of milk shake is 80 dollars 的80 dollars There is a pair of shoes -----5 dollars A They are B It is the river is about two hunderd f____ wide ,we all can swim across it there are two big trees over there提问my jacker is one hunderd yuan,提问 Forty dollars is enough for a child中为什么be要选择is呢? Here is a hundred of dollars.这里为什么要用is啊? do you think fifty dollars is/are enough for a chair?选is 还是 are 为什么 Today's special is just ____ to dollars.A.of BToday's special is just ____ to dollars.A.of B.on C.for D.with