单选题 .  Lately I have been noticing the great number of electrical appliances (电器) on the market. It seems to me that there are     1    now than a few years ago. I'm not really     2    why this is so,     3    I do have a few     4    . The first is that we are just too     5    to do things by hand     6    . For every little job we once had to do there is now a     7    . The second is that electrical appliance companies are just trying to make     8    out of people's laziness.
        9    all of these electrical appliances around for us to use now, I     10    how I would have lived fifty years ago.     11    , how would t have cleaned my floor? I guess I could have     12    one of those things called a "broom", which I     13    see now.
    I'm not trying to say I don't     14    electrical appliances; I certainly     15    . It is hard for me to imagine     16    I would do without my hair dryer!     17    ,I do think a lot of modern appliances are needless and     18    may become even lazier by using them.     19    we'll have a catastrophic (灾难的) electric failure some day and     20    just how much we really have been depending on our electrical appliances!1.