If a train_this tunnel,it would draw in fresh air behind it.A.would enter B.entered C.will enter D.enters

If a train_this tunnel,it would draw in fresh air behind it.A.would enter B.entered C.will enter D.enters 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 问一道英语奥数题A 120-meter train is gong to pass a tunnel.At 10:00 its head reaches one end of the tunnel and at 10:04 half part of the train still remains inside the tunnel.We know the speed of the train is 120km/h.so the length of the tunn if(a) {if(b if(a if(a if(a if(!a)和if(a)是什么意思?if(!a) if(a) if(a*a-6 if（!a）if（a）if（-a） if(a[j] int t; if(a If this was a if(fabs(a) if(fabs(a) if(a= if(fabs(a if(fabs(a)