单选题 Their parents once lived under very severe conditions.
【正确答案】 B
【答案解析】[解析] 题干大意:他们的父母曾经生活在非常艰苦的条件下。画线词severe:艰难的。选项中,hard:艰难的。sound:听起来,如:we can sound out the opinions of your prospective audience.我们可以试探一下你们未来听众的意见。strict:严格的,如:But as a student, you have to be strict with yourself.但是作为一名学生,你必须要严格要求自己。tight:绷紧的,如:Tight credit could suppress any rebound in spending, furthermore.此外,信贷紧缩可能抑制开支复苏苗头。