He didn’t make _____ clear when and where the meeting would be held.
| A．that | B．it | C．this | D．these |
— I’m sorry. That advice wasn’t of much .
— Oh, sure it was. As a matter of fact, it was most.
| A．help; helpful | B．useful; use | C．helpful; helpless | D．useless; useful |
The teacher stressed again that the students should not ______ any important details while retelling the story.
| A．leave off | B．leave out | C．leave for | D．leave over |
Wind power is an ancient source of energy _____ we may return in the near future.
| A．to which | B．by which | C．from which | D．on which |
Speaking of all the projects they have completed in recent years, we think this is probably the_______ one.
A．well -known |
B．better-known | C．best-known | D．most-known |
I’m wondering in which play_______ your brother will appear? I’ve no idea of the information of the performance.
| A．that is where | B．this is when | C．it is where | D．it is that |