Both of my brothers are now married ，so I have two_____.
A、sister-ins-lawB
“名詞+副詞/介詞”或“副詞/介詞+名詞”的復合名詞，單數變復數時，只將中心名詞變復數。如：on-look→on-looks;brother-in-law→brothers-in-law.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
_____alltherepresentativesstillnotthere，themeetingwaspostponedforseveralhours.
Thosepeople_____ageneralunderstandingofthepresentsituation.
It‘s_____mypowertomakefinaldecisiononthematter.
The teacher gave_____the examination paper.
