1._the years that followed,the crash was forgotten.

1._the years that followed,the crash was forgotten.
(a)Between (b)During (c)While (d)Among
2.Only three of the four Rolls Royce Merlin engines _rebuilt.
(a) will have to be (b) need have been (c)are being (d)had to be
3.If a train_this tunnel,it would draw in fresh air behind it.
A.would enter B.entered C.will enter D.enters
4.Jumbo must weigh a few tons.Jumbo_a few tons.
A.probably weighs B.has to weigh C.ought to weigh D.should weigh