What is at the end of a rainbow?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Which English verb becomes past tense just by rearranging the letters?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

What goes up but never comes down?

What can you catch but never throw?

What will you call your mother's brother's brother-in-law?

By using 'because' continuously three times, can you make an English statement ?