Today's expression, "Knowledgeis_____," is widely misunderstood. The more you know, the more ____ you will be.
| A．power, successful | B．power, success |
| C．powerful, successful | D．powerful, success |
Li Ling was a diligent boy . He ____ go to school though it was raining hard .
| A．was able to | B．could | C．couldn''t | D．wasn''t able to |
The work ____ be finished in such a short time .
| A．wasn''t able to | B．couldn''t | C．ought | D．could |
— ____ he open the door ? — Yes , please .
| A．Will | B．Shall | C．Does | D．Would |
— Do you have to take care of your mother at home ? — Yes , I ____ .
| A．do | B．have to | C．have | D．shall |
— You ought to have called her yesterday . — Yes , I know I ____ .
| A．ought to | B．ought go have | C．ought have done | D．ought to have called |