22.Lawrence Craven, a doctor from the USA,is the author of several published reports, one of______ introduced the idea in 1953 ______aspirin could reduce the risk of heart attacks.
----- ________ for the fire! ----- It's OK. I’ll be careful enough.
There is some doubt whether he will______ at the meeting.
The reason______ he was late for work was______ he didn’t get up early.
Before building a house, you will have to ______ the government’s permission.
The government has to close those small factories to prevent the water of the river___.