下列说法中不正确的一项是（ ）

As students, we should work hard and do ________ best to realize our dreams.

下列各句中，加点的成语使用不恰当的一项是(　　)

Not only this boy but also the girls __________ Hawaii before in our class.

When I saw the cars crash on the road，a frightened feeling __________ across my mind.[ ]