He paid for a seat, when he free.
| A．should have entered | B．could have entered |
| C．could enter | D．would enter |
266. At first he did not realize that he had succeeded in making a computer that ran on solar power(太阳能). “Realize” in the sentence means “___________”
| A．understand | B．get to | C．reach | D．come true |
265. Solids can usually be turned into liquids and liquids into gases if we _____ their temperatures high enough.
| A．rise | B．go up | C．increase | D．Raise |
264. The two brothers once quarreled _____ each other _____ the money when their father died, and now they have made up their quarrel.
| A．with; about | B．at; about | C．to; over | D．on; for |
263. --- When will that opera be ______?
--- I don’t know. But I hope they can _____ next Sunday.
put on; put on it B. put on; put it on C. put off; put off it D. put in; put it in
262. Sorry, I didn’t make a call to you because I forgot your telephone number. I should have _____ in my notebook.
| A．dropped in it | B．put it down | C．dropped it in | D．put down it |