_______it took 200 years to move from the steam engine to the Internet, there could be major development in _______ are now considered frontiers(尖端) of science in just the past few ten years.

Mr Chapmanretired at 70 after he nearly40 years with the Gas Company

In order to _____ the rising production costs, the subscription rates have been increased.

Kate is in hospital.—- Oh, really? I _______________ visit her

I________ an important conference at 10 o’clock this Sunday morning