I don’t know the meaning of the word. I have to _____ in a dictionary.
It was dark I couldn’t see anything.
Many people didn’t realize the importance of health _______they have fallen ill.
— Would you like to climb the hill with us tomorrow? — If it ___________ ,I ___________ .
–Do you know ______?–To meet her friends from America.
— Could you tell me ___________?—No problem.