—Where _______they from?
—They’re from Japan. [ ]
A. is
B. are
C. am
答案：B
You __________ us feel so happy![ ]
A. take
B. help
C. make
下列哪种维生素可引起巨幼红细胞贫血（）。
A.维生素B2
B.泛酸
C.维生素B12
D.维生素E
E.维生素D
