题目内容
She is due to __________ a speech on genetic engineering.
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All flights have been _______ due to the bad weather.
Shel was very excited when her dad ___ her drawing and hung it on the wall of their sitting room.
During the Cold War years of the last century, China made ___ achievements in developing nuclear weapons.
The billionaire set up a scholarship to encourage ___ young people to pursue scientific research.
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