Mary’s QQ number must have been stolen by someone else yesterday, _____? Because she asked me to lend her ￥5,000, _____ had never happened before.
| A．didn’t it; that | B．haven’t it; which |
| C．wasn’t it; which | D．wasn’t it; it |
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