1. The Smith family are inscrutable folks. They don't like to be around other people. When they are around others they never speak.2. Math is so hard to me.3. Physics is hard to understand.
 inscrutable hard to understandinscrutable 可用在難懂的事物上面
Smith 先生宣誓就職成為非洲的新財政部部長。 (請填空)
Mr. Smith has been sworn in as Africa's new Minister of Finnce.