The reason why he was late was ___he had taken a wrong bus.
—What is the date today? — It is _______.
—Which module is the most difficult in this book? — I think _____ module.
— Where is your mother? —She ________ the shop. She’ll be back in an hour.
—Do you know Peng Li yuan? —Of course, she is First Lady of China, famous singer.
If only I ________ driving before.