---- Why is the cake so expensive?---- Maybe you don’t know a cake made of wheat costs less than _____ made of rice.
【原创】Newspapers make a _____ from the advertisements they carry.
— I don't know how to spend my weekend.— _____
【原创】He has ____ hundreds of his paintings to the government.
【原创】Many scientists are still____about the value of the program.
【原创】When his friends heard my story, they _____ laughing.