风湿性关节炎的临床表现，下列哪项不常见（）

A.晨僵

B.关节肿胀

C.关节压痛

D.膝关节不能完全伸直

E.手的掌指关节有桡侧偏斜

We don't have much homework now and our school bags are ______ they used to be. [ ]

A. as heavy as

B. not as heavy as

C. as heavily as

D. not as heavily as