—We should do what we can ________ the endangered animals.
—Yes, it’s our duty_________ them.
| A．save; to protect | B．save; protect |
| C．to save; protect | D．to save; to protect |
There is _____ interesting on this channel. Please try a different one.
| A．no | B．none | C．nothing | D．something |
Is it important ________us __________ learn English well?
| A．for, learning | B．for, to learn | C．of, learning | D．of, to learn |
I don’t know when Kitty ___________ tomorrow, and please give this message to her when she _________________.
| A．comes; will come | B．comes; comes |
| C．will come; will come | D．will come; comes |
I can’t decide _____.
| A．to buy which one | B．which one to buy |
| C．to buy which | D．which to buy one |
Don’t worry _____, or you’ll get _____ thin.
| A．much too; too much | B．too much; much too |
| C．much too; much too | D．too much; too much |