41C has been out
42A Thanks for
43B has built
44B be telling
45D considerable
46C. However hard you try, you won't succced.
47A. He is interested in taking part in the English contest.
48A. Swimming in summer is what my brother like most.
49A. Mary said that she was not going to visit her relatives that weekend.
50A. I haven't written my brother for five weeks.
