1.If you (not feel)well, (lie) down for a while.
aren`t feel, lie
don`t feel, lie
don`t feel, will lie

2.If you (be) bored, (do)something else.
do, do
are, do
is, does

3.If Kate (go) to New York , she (can) see the Statue of Liberty.
goes, can
goes, cans
will go, can

4. Water (turn) into ice if the temperature (fall) below 0`C.
to turn, falls
will turn, fall
turns, falls