Just after putting away the dishes, _______.
| A．the doorbell was rung | B．mother heard the doorbell ring |
| C．someone knocked at the door | D．the doorbell rang loud |
The experiment can’t have been completed in such a short time,＿＿＿？
| A．can it | B．was it |
| C．has it | D．is it |
Don't you understand the fact, my dear daughter,＿＿＿he is interested in is nothing but your model？
| A．that | B．which |
| C．that what | D．what that |
I don't want any of the three books because I find＿＿＿of them useful for my study.
| A．nothing | B．no one |
| C．neither | D．none |
Thanks a lot. But for your text message, I＿＿＿my ID card at home this morning.
| A．would leave | B．might forget |
| C．would have left | D．should have forgotten |
Talented＿＿＿he is, he is not yet ready to turn professional.
| A．although | B．while |
| C．as | D．before |