Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one ________.
| A．blamed | B．blaming |
| C．to blame | D．to be blamed |
________ material used for running tracks in schools across China may be ________ danger to children's health.
| A．/；a | B．The；a | C．/；the | D．The；the |
I sent a big bunch of flowers to the nurse as an ________ of thanks for her taking good care of my grandpa in the nursing home.
| A．attitude | B．impression |
| C．appreciation | D．expression |
If you don't work hard，it will be of no ________ for others to help you.
| A．sympathy | B．significance |
| C．relation | D．sign |
Two of my friends are having their weddings on the same day，and I'm in a real ________ about which one to go to.
| A．situation | B．choice | C．trick | D．dilemma |
In a natural disaster，minutes and even seconds of warning can make the ________ between life and death.
| A．division | B．difference | C．separation | D．sense |