_______ progress it is, you can’t stop moving forward.
| A．Whatever great | B．However great |
| C．No matter how great | D．How great a |
It is __________ that everyone in the country likes to play it.
| A．so an interesting game | B．so a interesting game |
| C．such interesting a game | D．such an interesting game |
The light is still on. They ___ to turn it off when they left the room.
| A．must forget | B．could have forgotten |
| C．may forget | D．must have forgotten |
I often have conversation with John over _____ phone, but keep in touch with Tom by writing _____ letters.
| A．/; the | B．/; a | C．the; / | D．the; a |
Whenever I was in trouble, he would do what he could _____ me.
| A．help | B．helping | C．to help | D．helped |
The speaker raised his voice but still couldn’t make himself ______.
| A．heard | B．to hear | C．hearing | D．hear |