As young adults, it is our ____________to help the disabled.
_____ Australia is large in area, it is small in population.
--- _____ Haojiang Peach Blossom(桃花) Festival took place in late February. Did you go there?--- Yes. I took the No. 36 bus and then a _____ walk to Ju Feng Temple.
--- _____ can people communicate with each other if they can’t speak? --- By using _____.
--- Do you hear someone _____ on the door? --- Yes. It is late at night. Who can _____ be?
Disney research center creates _____ unusual robot which can draw pictures on the beach. _____ robot is 60 cm long and 40cm high.