San Diego's Zoo and Sea World are places where residents and visitors alike can enjoy r animals and plants in shows and exhibits, __ _ in part by San Diego's climate.
A．made it possible B．making it possible
C．making possible D．made possible
Not until all the fish died in the river how specious the pollution was.
A．did the villagers realize B．that the villagers realized
C．the villagers did realize D．didn’t the villagers realize
To help a friend solve the problem troubling him, .
A．a friend should be made known of his difficult situation
B．a man should be equipped with the kind of knowledge required
C．nothing is better than offering of knowledge required
D．keeping one’s promises is most important
Contemporary English is quite different from Old English. There has never been a year the language was not changing.
A．that B．when C．for D．until
It is not uncommon for there problems of communication between the old and the young.
A．being B．would be C．be D．to be
He to go to Beijing today, but he postponed the trip when he heard that there would be a downpour at noon.
A．was intending B．would intend C．had intended D．intended
