Our cousin who is attending college in New York phones us every Sunday at six, _________ as clockwork.
| A．usually | B．frequently | C．regularly | D．commonly |
The reason for their failure, you know, was _______ they didn’t get fully prepared for it.
| A．why | B．whether | C．that | D．what |
John promised his parents he _______ not smoke again, and he has not smoked ever since.
| A．would | B．could | C．should | D．might |
My brother left home five years ago. I _______ nothing from him up to now.
| A．hear | B．heard | C．have heard | D．had heard |
The power to our region has been _______ by the heavy snow.
| A．cut off | B．cut down | C．cut away | D．cut up |
______more effectively with foreign firms, many Chinese firms have turned to new technology．
| A．Being competed | B．To compete | C．Competing | D．Competed |