_______is really difficult for them_______the mountain.
| A．This,climbing | B．This,to climb |
| C．It,to climb | D．It,climbing |
I__________two baseballs and my friend five baseballs．
A．have；have B．have；has C．has；have
—This is my sister Ann．一Is______a student?
A．she B．he C．her
____________you play the violin?
A．Are B．Can C.Is
My father usually__________a shower____________the morning．
A．take；in B．takes；in C．take；on
How much are these shoes?____________twenty dollars．
A.Are B．There C．They’re