---- David, look at the man in white over there.Can you tell me _______ ? ----He is a doctor.
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.
The book will ______ you when you need help.
----My cousin is good at all his subjects at school, but he never ________. ----What a ________ boy! We should learn from him.