—Thanks for your help, but can you do me one more favor, please?
—______, sir．What's it then?
| A．It is nothing | B．That's right |
| C．At your service | D．Never mind |
Someone is ringing the doorbell. Go and see ______.
| A．who is he | B．who he is |
| C．who is it | D．who it is |
It was ten o’clock _____ he came back home.
| A．when | B．that |
| C．since | D．after |
“Where _______ go to work？” “Where _______ go to work is not known.”
| A．we shall, we shall | B．shall we, shall we |
| C．shall we, we shall | D．we shall, shall we |
It was when she was about to go to bed ______ the telephone rang.
| A．since | B．as | C．that | D．then |
None knows if _______ that boy, but if _______ him, her parents will be disappointed.
| A．she will marry, she will marry | B．she marries, she marries |
| C．she will marry, she marries | D．she marries, she will marry |