Over the past decades, sea ice _______ in the Arctic as a result of global warming.
| A．had decreased | B．decreased |
| C．has been decreasing | D．is decreasing |
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I was just going to cut my rose bushes but someone it. Was it you?
| A．has done | B．had done | C．would do | D．will do |
Dina, for months to find a job as a waitress, finally took a position at a local advertising agency.
| A．struggling | B．struggled | C．having struggled | D．to struggle |
John's success has nothing to do with good luck. It is years of hard work has made him what he is today.
| A．why | B．when |
C．which | D．that |
This coastal area a national wildlife reserve last year.
| A．was named | B．named | C．is named | D．names |
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