31) I seldom come there at night.
-> Seldom
32) We have never seen such a wonderful sight before.
-> Never
33) Those students arrvied late because they had an accident.
-> Because of
34) Tom was worried because of the heavy traffic.
-> Because the
35) I regret not finishing my homw work at the weekend.
-> I wish
36) Ba ate too much and then felt sick.
-> If
37) It started to rain at 2 o'clock
-> It has
38) She and I had never been there bofore
-> Neither
39) It was such good weather that we went swimming
-> The weather
40) I can't see that far
-> It is too
41) I'd rather not see him tomorrow
-> I don't
42) After many years of hard work, he tired
-> After he
43) With the money he has saved, he can buy a house
-> HIs saving money
44) We had to wait two hours for Ba
-> Ba kept
45) It is difficult for us to make ends meet these days
-> We find