---_________ clever boy your brother is!

---So he is. He is_________ in my family.

A．What a; clever

B．What a; the cleverest

C．How；cleverer

D．How a; the cleverest

破伤风病人发作期最早出现的临床表现常是( )

A．张口不便
B．牙关紧闭
C．角弓反张
D．苦笑面容