Question

几道初三英语单选题，烦请解释一下原因！~

非常感谢帮助，题目如下：(格式最好是：句意+原因/语法点）
1、If you compare food costs today _____ of a year ago,you will find the difference.
A.to that B.to them C.with that D.with those
帮分析一下A哪错！

2、Only _____ as an interpreter______ how important it is to grasp English
不打选项了，问：when I worked;did I realize 为何对?

3、It was the training ____ he had as a young man ____ made him such a engineer.
A.what;what B.which;that C.that;which D.that;what

4、it was 和 was it 有何区别？

以上题做题的技巧是神马？Thanks!!!

Answer 1

1,如果你对比一下几天和一年前的食品物价，你就会发现不同之处了
that 之前不用有介词
2.only 在句首，后面要用倒装
3.D