My mother is____soup. She often _____soup for us.
A:make;making
B:making;makes
C:do;doing
D:doing;does
比3.92多0.4的数是____,比4.93少1.5的数是____。
二元一次方程组9x+4y=1x+6y=-11的解满足2x-ky=10,则k的值等于( )
下列面镜、透镜中,都能对光线起会聚作用的是 ( )