—Listen! There is a knock on the door．Who _____ it be?
—It must be Jack．Just now I sent for him．
A．shall B．can C．must D．might
—What made the applicant so anxious?
—_____ he will get a job interview tomorrow．
A．That B．Because C．Since D．When
Just like fingerprints, each person’s DNA is ________unless he has a twin．
A．unusual B．normal C．various D．unique
— What do you think of investing in today’s stock market?
— There are many risks, but also many gains．
A．potential B．confidential C．influential D．preferential
The new CRH train between Beijing and Shanghai _______ speed once reached about 350km/h has had a 50 kph speed cut to 300 kph.
A．whose B where C．that D．which
These days I have been dreaming of a sale —— Buy two iPads and get completely free．
A．other B．the other C．another D．all
