─Do you know second-hand smoke?─To prevent our health and memory.
—What are you going to do in the summer vacation?
—I ________ a volunteer in the hospital.
was
am
will be
—What’s the ________ river in China?
—The Yangtze River.
long
longer
longest
—Why are you so excited?
—All of us take pride ________ the successful coming back of the Shenzhou-13.
in
on
at
—What can we learn from Robinson Crusoe?
—We should depend on ________.
us
our
ourselves
—What’s the most important tradition in a Chinese family?
—We must care for ________ old.
an
the
/