There were signs here and there,____visitors to look out for

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There were signs here and there,____visitors to look out for_____rocks.
A.warning:fallen B.warning:falling C.warned:fallling D.to warn:fallen

B.warning; falling
第一个现在分词warning作后置定语,相当于定语从句：which warned visitors...,表示“告示牌上写着警告”.
第二个现在分词falling 也作定语,表示”在下落过程中的“.

There were signs here and there,____visitors to look out for B)There were signs here and there,______visitors to look out There are signs here,___visitors to look out for the rocks There are ___ signs here. There ( ) so many signs here “Look out,there comes a bus!"Here "look out"means"---" There were some signs of strain There are so many （）signs here 25.There was a phone call for you while you were out and it There was a phone call for you while you were out and it was Everyone,you,here,look,is,for,there,and.连词成句 Betty———— （look for） her bike here and there,but she couldn'