As a grassroots singer, she reads everything she can get hold of and catch every opportunity she meets up with so as to gain _____ progress.
_____earth scientists understand how and why earthquakes happen, forecasts are usually inaccurate.
Mr. Smith wanted to buy the house and he told me that ____the house cost,it would be worth it.
I was so excited last night that it was a long time _____I got to sleep.
He finally won the general election because many of his promises were quite popular _____ the voters.
During the class, Tom slipped out of the classroom ____the back door so as not to be found by the teacher.