In my view, biology is ______ chemistry, but a little easier than mathematics.
| A．a subject so difficult as | B．as difficult a subject as |
| C．as a difficult subject as | D．difficult as a subject as |
相关试题
Bill was doing a lot of physical exercise to build up his______.
| A．energy | B．strength | C．force | D．power |
—I wonder ______ you’ll water this kind of flower.
—Every other day.
| A．how often | B．how long | C．how soon | D．how much |
. She brought with her three friends, none of ______ I had ever met before.
| A．them | B．who | C．whom | D．these |
. — Why does the Lake smell terrible?
—Because large quantities of water______.
| A．has polluted | B．have been polluted |
| C．has been polluted | D．is being polluted |
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