His aunt’s letters ___of those beautifuldays when they used to live together in his hometown.

_____ you have _____ homework to do everyday

Is that boy Alan—No, it ______ be him. He left for Beijing yesterday.

Father’s Day is coming. Could you tell me —What about a red silk tie He’ll like it.

Huge quantities of information ________available onthe internet, but whether the information ________ reliable needs to be furtherproved.