問題詳情：
選擇恰當的單詞填空．每詞限用一次．（有兩個多餘的選項）
because，robots，over，recycle，or，dangerous，our，and，forever，safe，cars，run
What will our world be like in 2050？We asked a group of experts to make their predictions about our future．
By 2050 we will have"clever"（1） ．We won't have so many accidents，（ 2） they will be able to communicate with each other．Cars will slow down by themselves or stop in（3） situations．Also，our cars will （4） on electricity or water．
By 2050 our homes will be more eco﹣friendly （環保）．We will use solar （太陽的） energy，and we
will clean and （5） our water．There will be many more people in the world （6） our houses will be smaller．Many houses will be underground and we will have （7） to help clean，cook and do （8） home shopping．
We won't die!We will put our brains onto computers and live （9） ．The computers of the future won't look like machines．They'll look like humans．
By 2050 there will be too many people on the earth and （10） 100 million people will be living on the moon and other planets．We will be able to travel to Mars and back in just three days．
【回答】
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