In English-speaking countries, ____is unlucky number while ____is unlucky number in China.
To finish the work on time, we'll have to work____ hours a day.
—When did the old man die?—He ________a rainy winter evening.
—Could you tell me ? —Certainly.
Tom said he had never been there, but he was .
— Don’t _______ too late, or you will feel tired in class.— I won’t, Dad.