Fill in the blanks with the proper words or expressions given below, changing the form if necessary. The organizer has ______1______ a number of famous singers to perform at the opening ceremony (开幕式). Exercise will always give you a good _____2_______. I'd like to _______3_____ some volunteer work if you don't accept my money. I'll phone you in my lunch ______4______ about the company's ______5______ dinner for the volunteers.