Complete the sentences with correct prepositions . at in with 1 . Families have many factors _ 1 _ common ，including their genes environment and lifestyle.2 . A family medical history can identify people _ 2 _ a higher - than - usual chance of having common disorders .3 . Healthcare professionals can determine whether an individual other family members or future generations may be _ 3 _ an increased risk of developing a particular condition according to disorders among relatives.
Complete the sentences with correct prepositions .
at in with
1 . Families have many factors _ 1 _ common ，including their genes environment and lifestyle.
2 . A family medical history can identify people _ 2 _ a higher - than - usual chance of having common disorders .
3 . Healthcare professionals can determine whether an individual other family members or future generations may be _ 3 _ an increased risk of developing a particular condition according to disorders among relatives.
题目解答
答案
1、in
in common 有两个意思:together with sb/sth与某人[某事物]一起：In common with many others, she applied for a training place. 她已和许多人一起申请参加训练；like sb/sth 像某人[某事物]一样: You are in common with me.我们俩志趣相投。
句子意思是，家庭有很多共同的因素，包括他们的基因、环境和生活方式。
2、with
句子意思是家庭病史可以确定人们患常见疾病的几率比平时高。
3、at
句子意思是，医疗保健专业人员可以根据亲属之间的疾病来确定一个其他家庭成员或后代是否会增加患某种特定疾病的风险。
解析
本题考查介词的固定搭配和语境理解。三个空分别对应不同的介词用法：
- in common 是固定短语，表示“共同的”；
- with 表示“具有某种特征或状态”；
- at risk 是固定搭配，表示“处于风险中”。
第1题
关键点：短语 in common 的固定用法。
句子中“many factors”后需填入表示“共同的”含义的介词。in common 与 have 搭配，表示“有共同的因素”。
第2题
关键点：with 表示伴随状态。
“people”后需填入表示“具有更高患病几率”的介词。with 强调人们“带有”这种特征，即“具有更高几率”。
第3题
关键点：at risk 的固定搭配。
“may be”后需填入表示“处于风险中”的介词。at risk 是固定短语，表示“面临风险”。