胃底腺
参考答案：胃底腺：分布于胃底和胃体部，呈分支管状（1），由主细胞、壁细胞、颈粘液细胞、干细胞和内分泌细胞组成（1）。
He spends as much time as he can _______ English every day. [ ]
A. to practice speaking
B. to practice to speak
C. practice to speak
D. practicing speaking
