I can’t remember when ______ turning point occurred exactly, but it might be ______ summer morning when I was in New York.
| A．不填；a | B．a; a | C．the; a | D．a; the |
Sandy could do nothing but _________ to his teacher that he was wrong.
| A．admit | B．admitted | C．admiting | D．to |
__________ she couldn't understand was__________ fewer and fewer students showed interest in her lessons.
A. What; why B. That ; what C. What ; because D.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
| A．since | B．before | C．after | D．when |
Neither of them knew what_____ was doing.
| A．other | B．others | C．the other | D．another |
The murderer was brought in, with his hands _____behind his back.
| A．to be tied | B．being tied | C．tied | D．having tied |