when you do math problem you must be----- A as you can as careful Bas you can as carefully

问题描述:

when you do math problem you must be----- A as you can as careful Bas you can as carefully
还有选项C as careful as you can D as carefully as you can 要解释和语法

When you do math problem you must be(C as careful as you can ).
当你做数学难题时,你一定要尽可能地仔细.
因为前面是be动词,所以用形容词careful而不是副词.
as...as you can,尽可能的\地.