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You’d better go there by train. The train ticket is________ the airplane ticket.

You’d better go there by train. The train ticket is _____ the airplane ticket.

You’d better go there by train. The train ticket is _____ the airplane ticket.

A．a(chǎn)s cheap three times as                   B．a(chǎn)s three times cheap as

C．three times cheaper than                 D．three times as cheaper as

You’d better go there by train. The train ticket is________ the airplane ticket.

You’d better go there by train. The train ticket is _______the airplane ticket.