－How was your final exam, Tom?
－I’m sorry, dad. I failed and only then the importance of studies.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
Not until his mother came in ________to prepare his lessons.
| A．did the boy begin | B．the boy began |
| C．began the boy | D．the boy did begin |
Not unti his fellows criticized him _______ to admit his mistake.
| A．does he begin | B．did he begin | C．began he | D．had he begun |
______, she isn’t ready to buy it.
| A．Much as she likes the gold ring | B．The gold ring much as she likes |
| C．Likes much as she the gold ring | D．As much she likes the gold ring |
Only __________ one loses freedom __________know its value．
| A．when, he does | B．when, does he | C．what, he did | D．that, did he |
It is required that students______ mobile phones at school, so seldom_______ them using one.
| A．don’t use; will you see | B．should not use; you will see |
| C．not use; will you see | D．can’t use; will you see |
_____twice, the postman refused to deliver our letters unless we chained our dog.
| A．Being bitten | B．Bitten | C．Having bitten | D．To be bitten |
Some seemingly harmless blogs might become harmful when ________ on the Internet by millions of people.
| A．to read | B．reading | C．read | D．being read |
Jack opened the door, there_____ he had never seen before.
| A．a woman did stand | B．a woman stood |
| C．did a woman stand | D．stood a woman |
I have been living in the United States for 20 years, but seldom ______ so lonely as now.
| A．have I felt | B．I had felt | C．I have felt | D．had I felt |