If liquid freon should come in with your skin, you should .,

If you go home late,you should tell your （) about it．A． father and motherB．teachers C． ch

If you want to get off to the right start, you should treat the receptionists as your pote

When checking the liquid level in a tank, you should position yourself _____.A.on the wind

If you are overhauling machinery, you should wear （) in order to protect your headA.eysgl

You should be more patient_____ your children.A.forB.ofC.with

To make a wish come true, you should______.A．say "God bless you"B．fling salt over your sho