There are some health problems that, when in time, can become bigger ones later on.

inese sports idol Li Na shocked fans by __________ her racket due to seriousinjuries in September, on the eve of a tournament in Wuhan, her home city.

r you believe it or not, it is ______that causesyour illness

ber 18, 1937 is a day _______ all Chinese willremember forever.

My room gets very cold at night.— __________.