—Where is our English teacher?
—She is in the classroom, _____ the exercises _________ the students have done at home.
| A．explaining; / | B．explaining; for |
| C．explained; to | D．explained; from[ |
Teachers have to constantly update their knowledge in order to maintain their professional(专业的)_______.
| A．consequence | B．independence | C．competence | D．intelligence |
Everything comes with _____ price; there is no such _____ thing as a free lunch in the world.
| A．a; a | B．the; / | C．the; a | D．a; / |
The most important thing_______we should pay attention to is the thing_______I have said.
| A．which that | B． that which | C． which which | D．that that |
We are invited to a party ________in our club next Friday.
| A．to be held | B．held |
| C．being hold | D．holding |
He's got himself into a dangerous situation ______he is likely to lose control.
| A．where | B．which | C．While | D．that |