—What about saving the drowning boy from the other side of the river?—In my opinion,______.
—Mary,turn the heat down,________ burn. —OK.Mum.
Seldom ________ TV when he studied in senior high school.
Everything,unless otherwise ________,will go on as planned.
—It's a pity that Andrew didn't want to go to the conference. —________ willing to go,we could have paid all his expenses.
The warning we were given as children ________ an apple a day keeps the doctor away may,in fact,have a scientific explanation.