问题
单项选择题
Mathematics as well as physics always（）me a lot of trouble.
A．has been caused
B．are causing
C．cause
D．causes
答案
参考答案：D
解析：
此句中as well as physics为插入语；主语mathematics为单数名词。
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Mathematics as well as physics always（）me a lot of trouble.
A．has been caused
B．are causing
C．cause
D．causes
参考答案：D
解析：
此句中as well as physics为插入语；主语mathematics为单数名词。