Learning that their only son was sound and safe _____ the family ______.
_________ computer games, his parents were very worried about his study.
. So seriously _____ in the accident that he was sent to hospital at once.
Though he had tried to climb to the top of the mountain several times, he didn't__________________.
I'd also like to _____ you on your good work in these two years.
I wondered what difficulty he had _________ the plan?