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
Many people expect that credit cards will eventually______ paper money for almost every purchase.
A. trade B.
replace 
exchange
D. reduce
A person ________ email account is full won’t be able to send or receive any emails.
A.
who B.
whom 
whose
D.
whoever
