Williams shows some challenging means ________ diners at their mystery lunch on Sunday might eat the special dish.
________ hard, and you will pass the final exam.
The past 30 years has ______ the great changes that have taken place in China.
– I’m sorry for what I said. -- Forget it, I can’t remember _________.
______ that the way people spend their holidays has changed a great deal in the past ten years.
______ the day going on, the weather got worse.