题目

句型转换，每空一词。 1. Jim did his homework last night.    （变为否定句） Jim ______  ______ his homework last night.2. The people there were friendly. （就划线部分提问） ______did you ______ about the people there? 3. The boy eats junk food three times a week.  （就划线部分提问） ______ ______does the boy eat junk food? 4. She is not as tall as me.  (同义句转换)  She is ______ ______ me. 5.我每周至少上一次钢琴课。 I have piano lessons ______ ______ once a week.在人的精子形成过程中，一个四分体包含 （    ）A．4条染色体B．4条染色单体C．2对同源染色体D．2个双链DNA分子