问题
单项选择题
He speaks English with p American accent, so he______brought up in the United States or Canada.
A．must have been
B．must be
C．may have been
D．can't have been
答案
参考答案：A
解析：must have been brought up in the U.S. or Canada“一定是在美国或加拿大长大”。对过去情况作肯定推断，用must have done。