Only when­­­­­­­­­­­­­­­­­___________ according to the directions can the medicine be quite effective.

He eats _______ food, so he is _______ fat.

The new law has come into________; surely it will have ________ on industry of the country.

As you worked late yesterday, you __________ have come this morning.

Jack was still very calm, ______ the quarrel with the boss, and greeted every person he met on the way back to his office.[ ]