I’ve ________ the habit of calling in on my grandparents on my way home from school.[ ]

this kind of medicine, if ________, willdo harm to health.

Optimism had been growing ________ the weekend meeting of European Union leaders in Brussels would come up with a substantial plan for dealing with the debt crisis.[ ]

Do you like to visit a place____ history is very long.

It was with great joy _____ the father received the news that his long-lost son had been found.