Mr. Smith owns ______ collection of coins than anyone else I have ever met.
| A． larger | B． a larger | C． the larger | D． a large |
You _____ tell him. He is fully aware of the danger.
| A．mustn’t | B．don’t need | C．needn’t | D．can’t |
_____ his ability of speech, he has made use of each chance.
| A．To improve | B．Improving | C．Being improved | D．Improved |
People pay ______as to the content of your speech.
| A．so much attention to your voice | B．as much attention to your voice |
| C．much attention to your voice | D．attention to your voice much |
____ I paid a visit to this scenic spot, I was deeply attracted by its beauty.
| A．The first time | B．At the first time |
| C．For the first time | D．At first |
I want to be very careful to talk only about ____ we've formally tested.
| A．which | B．that | C．what | D．whether |