It was only when I reread his poems (诗) recently _____ I began to appreciate their beauty.
| A．until | B．that | C．then | D．so |
The World War II made ______ impossible for Einstein to go on with his research.
| A．him | B．this | C．it | D．that |
It’s not ______ good idea to drive for four hours without ______ break.
| A．a; a | B．the; a | C．the; the | D．a; the |
--- Would you be able to go to the party ?
--- _______.
| A．I don’t expect | B．I’m afraid not | C．I don’t think so | D．I believe not |
Three fourth of the homework _______ today .
| A．has finished | B．has been finished | C．have finished | D．have been finished |
______ good, these cookies sell well.
| A．Smelled | B．Smelling | C．Being smelled | D．To smell |