I ________ for Beijing next Saturday. Do you know when the earliest plane ________ on Saturday?
| A．am leaving; takes off |
| B．Leave; takes off |
| C．leave; is taking off |
| D．am leaving; is taking off |
Misunderstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems.
| A．arisen; handling | B．arising; handled |
| C．rising; handled | D．risen; handling |
The text is too difficult. The explanation of our teacher will help make it easy ________.
| A．to understand | B．to be understood |
| C．understood | D．understanding |
It is said that sixty percent of all energy ________ in the world today is being lost as waste heat.
| A．produced | B．producing |
| C．to produce | D．having produced |
________ clearly ________ nothing to do, the soldiers left the village the next day.
| A．It; was | B．It; being |
| C．There; was | D．There; being |
—I regret ________ you that your application has not been successful.
—Not successful? I performed pretty well in my interview!
| A．informing | B．to inform |
| C．having informed | D．to have informed |