Suddenly he burst into ______ and we all were astonished.
A、
laugh
B、
laughter
C、
smile
D、
launch
【正确答案】
B
【答案解析】
句意：她突然大笑，我们都被震惊到了。laughter笑，笑声。burst into laughter突然大笑起来。laugh笑，引发笑的事或人。smile微笑。launch发射，发行。
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