Question

【题目】You must be careful ________ the machine. It's dangerous.

A. to B. with C. at D. for

Answer 1

【答案】B

【解析】

句意：你必须小心这台机器。它很危险。A. to到，向，朝着；B. with与……一起；C. at在；D. for为了。be careful with当心，小心。用来提醒别人小心某物或某事，“with”后接名词或动名词。故答案为B。