题目

Instead of getting down to a new task as I _____, he examined the previous work again. A . had expected B . have expected C . would expect D . expect 答案：A105-5×2+3=（105-5）×2+3=50+90÷（2×3）=（50+90）÷2×3=105-5×（2+3）=105-（5×2+3）=50+90÷2×3=（50+90÷2）×3=