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Let’s think of a situation_____ this idiom can be used.（）

• A、where

• B、which

• C、that

• D、what

58（）

.Many people don’t know that_____.

• A、twins understand each other very well

• B、twins are slow to learn to talk

• C、twins are unlikely to do less well at school than other children

• D、there exists more communication between twins