To invent a new kind of electric light, Thomas Edison did lots of ____.
| A．research | B．inventions | C．experiments | D．experiences |
相关试题
I have a______ 
for breakfast everyday.
| A．hot dog | B．cookie | C．dumpling | D．hamburger |
—Bob, you look so happy today!
—Well，I got ______ A on my English test．
| A．the | B．a | C．an | D．/ |
He lives ______, but he never feels _________.
| A．alone; alone | B．lonely, lonely | C．alone, lonely | D．lonely, alone |
The door is __________.Who ______ it?
| A．open; opened | B．open; open | C．close; closed | D．closed, close |
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