—It's difficult for me ________ there are few new words in it.
A:if
B:so
C:because
D:although
用(How many\How much)的适当形式填空。
《贝多芬》在立意和构思上扣住什么主题选材?
计算
(1)643﹣-132+--15+0
(2)x-33﹣6x-16>﹣3.