Though a typhoon is on the way, people are still looking forward _____ the outdoor concert by the pop singer.
The coat ________ thin but ________.
Food supplies in the earthquake area ________. We must act immediately before there’s none left.
No scientists can exactly figure out what ________ happened ________ at that time, which caused the extinction of the dinosaurs.
Experiments of this kind ________ in both the U.S. and Europe long before the Second World War.
-- Shall we take a taxi there since time is limited? -- ________. It should be hard to get one during the rush hour.