China is expected to export 1 billion mobile phones this year, ________ by a surge in demand for smartphones worldwide.
A．drive B．driving C．to drive D．driven
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
