_______to sunlight for too much time will do harm to one’s skin.

Oil prices have risen________32 percent since last year，________a record $84.65 a barrel on Nov.9.

Every Saturday morning we can see that old woman __ ___ shopping.

If water becomes increasingly scarce in decades ______, water shortage will become a hot issue all over the world.

I had great difficulty___________ the suitable food on the menu in that restaurant.