5 Complete the text with affirmative and negative forms of can, could and will be able to. Boy in a bubble
2
When Rob Thompson was born.
he had a defective immune system,
so his body couldn't fight against
diseases. He¹___only survive inside
a sterile plastic bubble or room. He²___ play outside with friends. But thanks to a new treatment, Rob³___now do most of the things that he wants to do, although he⁴___ live without special drugs.
In the future, scientists⁵___help other people like Rob with
gene therapy. They⁶___ improve the treatment for this illness
and maybe even find a cure one day.​

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A  double-decker bus  is a  bus  that has twostoreys  or decks. double-decker buses are used for mass transport in the united kingdom, europe, asia and many former european possessions, the most iconic example being the red london bus. early double-deckers put the driver in a separate cab. passenger access was via an open platform at the rear, and a  bus conductor  would collect fares. modern double-deckers have a main entrance door at the front, and the driver takes fares, thus halving the number of bus workers aboard, but slowing the boarding process. the rear open platform, popular with passengers, was abandoned for safety reasons, as there was a risk of passengers falling when running and jumping onto the bus. double-deckers are primarily for commuter transport but open-top models are used as sight-seeing buses for tourists.  william gladstone, speaking of  london's double-deck horse drawn  omnibuses, once observed that " best way to see london is from the top of a bus".