Hurry up, or you won’t be in time for the meeting!—–Oh, my dear. My watch is five minutes _______.

Every solid object ______ reflect a sound，varying according to the size and nature of the object．

My mother often tells me _______ others when they are in need of help.

Water is the cheapest drink. And it is also ______.

Is your uncle in his______—Yes. His forty-first birthday is coming next month.