. Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.
| A．when | B．whose | C．where | D．that |
— Do you have to take care of your mother at home ?
— Yes , I ____ .
| A．do | B．have to | C．have | D．shall |
— Would you please go to the cinema with me ?
— Yes , I ____ .
| A．will | B．would | C．could | D．should |
I''m surprised that he ____ to help me when I needed his help .
| A．should refuse | B．would have refused |
| C．should have refused | D．may have refused |
The men got out and pushed the bus . But it ____ move , not one bit .
| A．couldn''t | B．wouldn''t | C．needn''t | D．shouldn''t |
The fire spread through the hotel very quickly but everyone ____ get out .
| A．had to | B．would | C．could | D．was able to |