一个布袋里有4种不同颜色的球,每种各有50个,如果闭上眼睛取球,至少取出( )个球才能保证其中有5个颜色相同.A.4 B.5 C.17
What color is the slide? It’s _________. A. blueB. big C. a swing
What are they? _______ cameras. A. You’re B. They’reC. It’s
How many _____ are there in the sky? A. balloonB. a balloon C. balloons
Who’s _____? My sister. A. he B. sheC. you
Who’s he? My _____. A. sisterB. brother C. Miss Yang