NHL累及胃肠道的最常见部位是（）
A.食管
B.胃
C.十二指肠
D.回肠
E.结肠
参考答案：D
David is student in our class. Nobody is taller than him.
A. tall B. taller C. the tallest
Deeds are better than words when people are _____ of help. [ ]
A. in need
B. in fact
C. in danger
D. in return
