_____ there any pencils in the table? [ ]
A. Is
B. Are
C. Do
D. Does
答案：B
She ________ hum pieces of music at the age of four. She is a talented singer. [ ]
A. can
B. could
C. must
D. should
关于下图下列说法正解的是
A．甲是静脉
B．丙是动脉
C．乙是毛细血管
D．甲一定流动脉血
