Do you know the___of the saying I just quoted?

Tom is one of the best students in the school and there is no _______that he will get the first prize in the competition.

Many kinds of birds fly south at the ______ of winter.

According to experts, houses with good ______ to the shops and schools can resist the decrease in the prices.

. ---Why do you say that the doctor is in a _______? ---Because he doesn’t know whether to tell the patient the truth or not.