---Has Mr. Smith ________ heard about the story?---No, he hasn’t .
Everyone lent a hand so that the work ______ a week earlier than I had planned.
Tony is ______ than his father, though he is only eleven years old.
— ______ will I stay in Singapore during the summer holiday?— Let me check it for you. For two days.
We’d better ______ subjects like age, weight or money while talking in Western countries.
If ______ is a high-stress job, it is important that you learn how to relax after a busy day.