We climbed a tree,and all of a sudden it _______ to us that

We climbed a tree,and all of a sudden it _______ to us that we were rather big to be up in 求详解
We climbed a tree,and all of a sudden it _______ to us that we were rather big to be up in a tree.
A.struck B.lighted C.occurred D.came
4．Written in a hurry,_______ .How can it be satisfactory?
A.they found many mistakes in the report
B.Sam made lots of mistakes in the report
C.there are plenty of mistakes in the report
D.the report is full of mistakes
5.Catherine,_______ the alarm clock for 6 o’clock,or you would oversleep and be late for the train.
A.setting B.sets C.set D.to set
请详解