He is _________ about his chances of winning a gold medal in the Olympics next year.
| A．optimistic | B．optional | C．optimal | D．obsessed |
It is not enough only________ the rules of grammar if you want to learn English well.
| A．keeping in the mind |
| B．to keep in mind |
| C．to keep in your mind |
| D．keeping in your mind |
He________ the person referred to be put in prison.
| A．said | B．demanded |
| C．agreed | D．thought |
______you I owe a thousand apologies________ having doubted your ability.
| A．For; to | B．To; for |
| C．For; for | D．To; to |
______at in this way, the present situation about birds flue doesn’t seem so disappointing.
| A．Looking | B．Looked |
| C．Having looked | D．To look |
______, I think, and all the problems could be settled.
| A．If you make more efforts |
| B．Making more efforts |
| C．A bit more effort |
| D．To have made more efforts |