题目：
Excess sodium in the diet may lead to high blood pressure or
hypertension,_____ .
(A)it is a disease affecting one in four Americans
(B)is a disease affecting one out of four Americans
(C)a disease affecting one in four Americans
(D)one in four Americans are affected by this disease
答(C)，后面子句是说明高血压
请问(A)多了it is 不对的原因是?
题目：
The restaurant_____next to the bank sells excellent pasta
so it attracts a number of guests.
(A)that locates (B)located (C)locating (D)is located
答(B)，因为本身程度很差，看起来好像每个答案都可以，
请问这题是考什么?
谢谢帮忙回答!