What does this below rebus puzzle mean?

Take away the whole and some still remain. What is it?

How can you leave a room with two legs and return with six legs?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

What is the next shape from answers A, B, C, and D figure?

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

What month of the year has 28 days?

Which tank will fill first?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Who always enjoys poor health?