Is this museum ________ they visited last month?

The death of his devoted son was a painful experience, ______ he had never fully recovered.

though they are not doubtful at all _______ John will pass the exam, I still wonder ______ he is fully prepared.

依次填入下列各句横线处的成语，最恰当的一组是（ ）（3分）①一旦独立地投入严峻的生活，中学生的浪漫情调很快就 。②想到众兄弟就要 ，他不免一番悲戚。③偌大的城市想找个人，如同 ，今天竟在街头无意中碰上了。④以雪填井，画饼充饥，种种愚昧无知的行为无异于 。

How are you getting along with your English study—Much better. I don’t feel it was as as before.