Luckily to be no one under the tree when it broke downA.it happenedB.there happe
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Luckily ______ to be no one under the tree when it broke down
A.it happened
B.there happened
C.there used
D.it had
试题答案
B
本题考查there be句型与happen to的连用，根据句意可知需要用there be结构，happen to表示“碰巧”。句意：幸运的，当树倒下的时候，下面碰巧没有人。