—Thank you very much. —It’s a piece of cake compared to your saving my life: I am forever ______.
Misunderstandings_______ from short of communication, unless______ properly, may lead to serious problems.
________ where we can stay for a week.
Carbon dioxide(CO2)_______ from burning fuels is the most common of the so-called greenhouse gases.
We must apply what we have learned to our daily work because in no case_____ from practice.
Mrs. White found her husband surrounded by letters and papers and_______ very worried.