When asked to explain ________ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply.
| A．what it is that | B．that what it is |
| C．what is it that | D．that what is that |
Unfortunately, ____ stone hit him on ______ head and he got injured.
| A．the; a | B．a; 不填 | C．a; the | D．the; the |
____ to Anne's birthday party, Mr. Brown is now searching shop after shop for a nice present for her.
| A．Having invited | B．Having been invited | C．Have been invited | D．Being invited |
The activities organized by our school really gave us a platform ____ we learned team spirit.
| A．that | B．where | C．which | D．when |
She is not going to buy the sofa because it _____ too much room in the living room.
| A．takes away | B．takes on | C．takes down | D．takes up |
The businessperson wanted to sell his goods fast: ______, he chose his partner with great care.
| A．and | B．otherwise | C．however | D．therefore |