IT IS CHEAPER TO GO BY TRAIN THAN BY AIR.A. GOING BY AIR IS CHEAP...

374) - DE THI TNTHPT 374) - DE THI TNTHPT
DE THI TNTHPT
374) It is cheaper to go by train than by air.A. going by air is cheaper than going by train.B. going by air is as cheap as going by train.C. going by train is cheaper than going by air.D. going by train is not cheap.