The baby is generally healthy, but every now and then he ______ a cold.

Listening to loud music at rock concerts__________caused hearing loss in some teenagers.

 For the sake of enough time for study and rest, students are _____ from using cellphones in our school.

-- What is the price of petrol these days? --- Oh, it ______ sharply since last month.

-- Mr Jordan, we want to hear your opinion about the current NBA games．-- OK, I ____ to that.