—What is the boy doing?
—It's not necessary for you to be ________ about others' business.
| A．connected | B．combined |
| C．contributed | D．concerned |
_______team will win the match is a matter of public concern.
| A．Which | B．That | C．If | D．How |
_______makes mistakes must correct them.
| A．Who | B．Anyone | C．Whoever | D．Anybody |
_______you come or not is up to you.
| A．What | B．If | C．Why | D．Whether |
_______he won't go there is clear to all of us.
| A．How | B．What | C．Why | D．This |
_______the house will be built will be discussed at tomorrow's meeting.
| A．If | B．Where | C．That | D．What |