能使甲状腺缩小、变硬的是
A．老年人B．青壮年C．2岁以内小儿D．3岁以上儿童E．新生儿
参考答案：C
He is _______ clever boy that he can solve _____ many difficult problems.
A．so a, so
B．such a, so
C．such, such
D．so, so
