Madonna _____ a straight-A student, but it was dancing that she was really crazy about .
| A．must be | B．could be | C．must have been | D．could have been |
As we are busy these days, we might this urgent work for the time being.
| A．undertake | B．agree | C．undergo | D．change |
Nobody believed his reason for being absent from class he had to meet his father at the airport.
| A．why | B．where | C．that | D．because |
I hope you will keep us of how you are getting on with the work.
| A．inform | B．informing | C．to inform | D．informed |
When the day dawned, stars from the sky.
| A．kept away | B．faded out | C．faded into | D．died out |
He did not for a minute to save the drowning child and jumped into the river immediately.
| A．hesitate | B．wonder | C．charge | D．determine |