23. Everyone should remember it is very important to _____ the balance of nature toady.
| A．get | B．make | C．keep | D．Remain |
You have made several mistakes in your exercises but ________you have done well.
| A．on the whole | B．except that |
| C．generally speaking | D．on the other hand |
The water lever has risen ________10 cm and up to 100cm in the last days.
| A．to | B．of | C．in | D．by |
The touch they had both kept in ________many years broke.
| A．for | B．on | C．with | D．into |
Don’t call me up in the company tomorrow,for I am________.
| A．in holiday | B．on holiday | C．for a holiday | D．during holiday |
He isn’t very successful ________a singer but he is quite known ________his music.
| A．for;as | B．as;to | C．as;for | D．for;to |