His grade in the exam put him _________ the top students in his classes.
| A．between | B．over | C．among | D．above |
I was born _________ the morning of September 1st.
| A．/ | B．in | C．at | D．On |
一 woman is Tom’s mother?一The one in the red coat．
| A．What | B．Who | C．Which | D．Whose |
Don’t play a trickhim．
| A．at | B．on | C．to | D．For |
Thank you very much for ________ us.
| A．help | B．helping |
| C．to help | D．helps |
We have to discuss this question.
A. enough time; enough difficult
B. time enough; difficult enough
C. enough time; difficult enough