补充254/大全18

Even though the state has spent ten years and seven million dollars planning a reservoir along the Ubi River, the project will have to be abandoned as a result of the river becoming so heavily polluted.

(A) will have to be abandoned as a result of the river becoming so heavily polluted

(B) is to be abandoned on account of the heavy pollution which the river received

(C) had to be abandoned because the river had received such heavy pollution

(D) has to be abandoned because of the river and its heavy pollution（E）


(E) must be abandoned because the river has become so heavily polluted


答案E


1.A哪里错了？


2.想问must 和have to 的区别？must表示更主观的含义，have to 表示不得不，那么must用在这里