25. Welcome to the Historical Museum, everyone! This stone knife _______ in South Africa and experts can’t be exactly sure about its use.
Without permission, no one ______ let out the news.
A 6.5-magnitude earthquake ________ southwest China’s Yunnan Province on the afternoon of August 3, leaving 615 dead and more than 3140 injured .
It hasn’t been ______ that food from cloned animals is really safe for humans to eat.
We wanted to purchase the house, but couldn’t ________ the money.
The audience _______ as they waited for the comedian to come on the stage.