_____ interest in studying abroad is rising, more Chinese students who study abroad are also returning home upon completing their degrees.
A.Once B.Since C.While D.Until
When enough years _____ to enable us to look back, we sometimes discussed the events leading to his accident.
A.went by B.were to go by C.had gone by D.goes by
China's development can't continue without lawmakers, nor _____ move forward without scientists .
A.it can B.can it C.can't it D.it can't
Tu Youyou's route to the honor has been _____ traditional for she has no medical degree and never worked overseas.
A.anything but B.nothing but C.everything but D.something but
70,000 pigeons were _____ in Tian'anmen Square on Oct 1 to mark the 70th anniversary of the founding of the People's Republic of China.
A.delivered B.relieved C.released D.liberated
"Hongmeng" was once used to describe the _____ state of the universe before matter existed.
A.original B.systematic C.permanent D.unconscious
