The boy doesn't work hard enough at his lesson. As for his intelligence, he has ______ he can possibly make use of.
_____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.