The handles ______ so that children can grasp them firmly.A．can be shapedB．should be shapedC．must have been shapedD．should have been shaped选什么为什么呀

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The handles ______ so that children can grasp them firmly.
A．can be shapedB．should be shaped
C．must have been shapedD．should have been shaped
选什么为什么呀

B
表示建议的只有B,其余A表能力C表猜测D表虚拟

The handles ______ so that children can grasp them firmly.A．can be shapedB．should be shapedC．must have been shapedD．should have been shaped选什么 为什么呀