The polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declineThe polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declined B is declined C is declining D will be declined
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The polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declineThe polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declined B is declined C is declining D will be declined
The polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has decline
The polar ice cap ______ at the rate of 9% per decade as a result of global warming.
A has declined B is declined C is declining D will be declined
The polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declineThe polar ice cap ______ at the rate of 9% per decade as a result of global warming.A has declined B is declined C is declining D will be declined
C
由于全球变暖,极地冰冠正以每十年9%的速率消退
答案最好是【has been declining】