So difficult it to work out the problem that I decided to ask Tom for advice．
| A．I did find | B．I have found | C．did I find | D．have I found |
Almost ____ of the students in this class ____ glasses, that is, ____ of them.
| A．two thirds; wear; 60 percent | B．two thirds; wear; 60 percents |
| C．two third; wears; 60 percent | D．two third; wears; 60 percents |
The number of people invited ____ fifty, but a few of them ____ absent for different reasons.
| A．were; was | B．was; was | C．was; were | D．were; were |
---- Guess what! I have passed my driving test last week.
---- ______!
| A．Congratulations | B．Celebrations | C．Good luck | D．All right |
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 riverhow 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 |