— When can I see you, Mr Black? Three o’clock this afternoon?— Oh, no. I ________ a meeting then.
China is expected to export 1 billion mobile phones this year, ________ by a surge in demand for smartphones worldwide.
Misunderstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems.
The text is too difficult. The explanation of our teacher will help make it easy ________.
It is said that sixty percent of all energy ________ in the world today is being lost as waste heat.
________ clearly ________ nothing to do, the soldiers left the village the next day.