用所给词的适当形式填空 offer; reach for; out of; time for; invited 1) The 2008 Beijing Olympic Games were such a good _____________ the world to know more about China. 2) The professor encourages us to ____________ opportunities instead of waiting for good luck. 3) Another story? Oh, children, my mind is _____________ any stories at the moment. 4) The organizer has ____________ a number of famous singers to perform at the opening ceremony ( 开幕式). 5) I'd like to ____________ some volunteer work if you don't accept my money.