__________ her son for half a month, Marcia decided to leave for Texas with the hope of finding him.
| A．Not heard from | B．Having not heard from |
| C．Not to hear from | D．Not having heard from |
Dave nearly ran into a block when walking down the street with his mind ______ on the word puzzle.
| A．to fix | B．fixing | C．fixed | D．was fixed |
______ is the kindness of the nurse that the patient can never be _______ to her.
| A．So; too thankful | B．Such; too thankful |
| C．So; that thankful | D．Such; enough thankful |
Since nobody gave him any help, he ______ have done the research on his own.
| A．can | B．must | C．would | D．need |
I was wondering what to do with my car which won’t start ______ a kind man offered to help.
| A．while | B．and | C．so | D．when |
---Why does Peter look upset?
--- He is a newcomer to the class and is having difficulty ______ by his classmates.
| A．accepted | B．to be accepted |
| C．accepting | D．being accepted |