With so many problems____ , the newly-elected president had a hard time.
| A．settled | B．to settle | C．being settled | D．was settled |
It occurred to me ________ Jack might be interested in the problem we had discussed.
A. what B. why 
how much D. that
Mary wrote books to earn money while John gained his wealth ________ selling Mary’s works.
A. with B. by 
on D. through
It took me quite a long time to ________the new environment here.
A. adapt to B. relate to 
apply to D. attach to
—I’ll call you at 9 tomorrow morning, OK?
—You’d better not, I ______ the piano then.
A. will be practicing B. am about to practice
am practicing D. practiced
exchange D. reduce
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