iversity estimates that living expensesfor international students ________ around $8,450 a year, which ________ aburden for some of them

Look! My classmate Ben is _____. He often ______.

Excuse me, sir. Is the swimming pool open all day—_______. Only from 6:30 p.m. to 9:30 p.m.

The old man was walking in the park, with his dog _____ him.

－Many boystudents think math is ______ English.－I agree. I’mweak in English.