The majority of doctors ______ smoking is harmful to health.
| A．are believed | B．had believed | C．has believed | D．believe |
“Never for a second，”the boy says，“________that my father would come to my rescue.”
| A．I doubted | B．do I doubt |
| C．I have doubted | D．did I doubt |
Not once________to Michael that he could one day become a top student in his class.
| A．occurred it | B．it did occur |
| C．it occurred | D．did it occur |
Not until he went through real hardship ________ the love we have for our families is important.
| A．had he realized | B．did he realize |
| C．he realized | D．he had realized |
—Do you hear Jim and Mary broke up?
—No，I haven't heard of it，and neither ________ about it.
| A．can I care | B．do I care |
| C．I care | D．I can care |
The teacher together with the students ________ discussing Reading Skills that ________ newly published in America.
| A．are；were | B．is；were |
| C．are；was | D．is；was |