They often _________ a lot of time _________ their students.

They often _________ a lot of time _________ their students.(4 分)
A.took,to help
B.took,helping
C.spent,to help
D.spent,helping
She has to ask for _________ leave.(4 分)
A.two day
B.two days
C.two day's
D.two days'
Many children in China like to play _________ .(4 分)
A.piano and bridge
B.the piano and the bridge
C.piano and the bridge
D.the piano and bridge
Do you know _________ (4 分)
A.who is the man
B.who the man is
C.the man is who
D.the man who is
第一个选择C和最后一个选择A肯定都是错的
因为我也这样选择的