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The proper way to write the sentence would be "However, no one believed rumors about the Komodo dragon either." Since commas are used after words like "first, second, third, then, finally, however, but..." there would only be 1 comma in this sentence.
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18)My sister who lives in San Francisco<u><em>, </em></u> is a chemist!
19)My sister who is a doctor , lives in London!
Answer:
I'm only having a guess here:
Two, empty, and several.
Explanation:
"Two"
describing how many bulldozers there are
"Empty"
describing the parking lot
"Several"
describing how many weeks the bulldozers have been in the parking lot for