It was very of you to let us know you were going to be late
| A．suitable | B．considerate | C．worthwhile | D．modest |
To succeed in a scientific experiment _____ .
| A．carefulness is need | B．carefulness is one needs |
| C．one needs to be careful | D．one need being careful |
The long lasting war, ______ with blood and deaths, ended in people’s sadness, _______ no result．
| A．filling；reached | B．filled；to reach |
| C．filling；would reach | D．filled；reaching |
On December 28, 2009, a terrible tsunami happened in the coasts of South and Southeast Asia, _______ over 25,0000 people.
| A．killing | B．had killed | C．killed | D．having killed |
I’ll do whatever I can _________ my English.
| A．improve | B．to improve | C．improving | D．to improving |
You must follow the directions exactly, and if you should become_______ , you must take the time to go back again and read them over.
| A．confused | B．to be confused | C．to confuse | D．confusing |