题目

To help their children find better work in the future, parents often _____ their children ____ more skillsA.force; learning B.force; learnC.force; to learn D.force; not to learn 答案：【答案】C【解析】句意：为了帮孩子们将来找到更好的工作，父母经常强迫孩子学更多技能。考查非谓语动词。force强迫，迫使，是动词，其后接动词不定式作宾语补足语，即force sb. to do sth.，意为“强迫某人做某事”，所以排除AB；根据句意，可知是“强迫孩子学技能”，故选C。已知线段AB，延长线段AB到C，使BC=12AB，D是AC的中点，再将AB反向延长到E，使EA=AD，若AB=6cm，求AE的长．