— You can’t imagine ______ little ants can carry ______ heavy a thing.— That’s what we should learn from ants.
----Do you know_____ second-hand smoke? ----To prevent our health and memory.
---- Will you buy this tie for Dad? ---- I have no idea. I don’t know or not the colour matches his new shirt.
The child is too young to_________ himself.
You can never imagine what great difficulty I have _________ your house.
----I wonder if your father _______ you to go swimming. ----I’m not sure. But I will tell you if he _______ to let me join you.