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13． it was hard for children to leave family and friends，many families chose to send their children to America．（　　）

A．

Because

B．

Although

C．

D．

分析盡管離開家人和朋友孩子們不容易，但很多家庭還是選擇把他們的孩子送到美國去．

解答答案：B 句意表達是轉折關系；because因為，although盡管，if如果，as由于；根據句意，故選B．

點評從屬連詞是連詞的一種，用來引導名詞性從句和狀語從句．大致可分為三大類：that（無詞義，不做成分）if，whether （表達是否的意義，但不做句子成分）；連接代詞：who，whom，whose，what，which，whatever，whoever，whichever（有詞義，在句子中可作主語、表語、賓語）；連接副詞：when，where，why，how，how many，how long，how far，however，whenever，wherever （有詞義，作從句的狀語）．學習時，要注意區分和掌握．

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