The police were seeking more information to find out________ killed the rich merchant.
| A．who it was that |
| B．who was it that |
| C．it was who |
| D．who was it |
He was so busy. He cannot afford enough time with his son _____ he wants to.
| A．even if | B．as if | C．because | D．before |
Someone is ringing the doorbell. Go and see ____.
| A．who is he | B．who he is |
| C．who is it | D．who it is |
smooth
| A．youth | B．strength | C．thunder | D．worthy |
really
| A．breathe | B．thread | C．theatre | D．ocean |
surprise
| A．occur | B．purpose | C．church | D．survive |