Water, _____ we cannot live, exists in the form of liquid, gas or solid.
I didn’t see your sister at the meeting. If she ___________, she would have met my brother.
“I love traveling. I hope to go with you this time.”“But does your mother _____ you to go?”
—If he ___________, he ________that food.—Luckily he was sent to the hospital immediately.
Neither of her parents wanted her to _____ her cousin.
—Would you like to come to dinner tonight?—I’d like to, ___ I’m too busy.