选择填空。
Is your brother good at ______?[ ]
A. sing
B. to sing
C. sings
D. singing
答案:D
Don't get much ________ practice. [ ]
A. write
B. writing
C. writted
D. written
在SQL语句中,SELECT语句中的JOIN 是用来建立表间的联系短语,应放在下列哪个短语之后( )。
A.FROM
B.WHERE
C.ON
D.GROUP BY