He turned down the request of his friend because it was________the limit of his power.
I find the lecture I attended in the Nanjing Normal University yesterday difficult _____.
To their great relief, the missing child returned home, ______, after an absence of two weeks.
Mrs. White found her husband surrounded by letters and papers and ________ very worried.
—I want someone to write the composition for me. — No! It’s a rule in our school that as a student, you _______ depend on yourself.
In many people’s opinion, that company, though relatively small, is pleasant _______.