Mary wrote books to earn money while John gained his wealth ________ selling Mary’s works．
A．with B．by C．on D．through
It took me quite a long time to ________the new environment here．
A．adapt to B．relate to
C．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
C．am practicing D．practiced
Many people expect that credit cards will eventually______ paper money for almost every purchase．
A．trade B．replace C．exchange D．reduce
A person ________ email account is full won’t be able to send or receive any emails．
A．who B．whom C．whose D．whoever
Global warming causes the ocean ________, which in turn speeds ice melting．
A．to warm B．warming C．warmed D．warm
