____ to nuclear radiation, even for a short time, may produce variants of genes in human body.
Even if the treatment ________, there is still no magic pill for patients in the late stages of AIDs.
He is ______to win the political campaign and becomes the president.
.— Mr White didn't come last night, did he? — No. We _____for him . A whole night was wasted.
--Steven has got the first prize in the math contest. --____ he looks so happy today.
The film, _______the true story of this Red Army general, attracted people’s interest all over the country.