问题 选择题 给下列的算式选择正确的英文答案。( ) 1. 100 + 400 ( ) 2. 300 + 60 ( ) 3. 800 + 200 ( ) 4. 2,000 + 700A. three hundred and sixtyB. one thousandC. five hundredD. two thousand seven hundred 答案 1. C 2. A 3. B 4. D
