主语
Now the air pollution in this city _____ more and more serious with each passing day.
Now the air pollution in this city \_\_\_\__ more and more serious with each passing day.
It was in their London branch _____ we met and discussed the issue.
It was in their London branch \_\_\_\__ we met and discussed the issue.
No sooner _____ arrived at the station than it began to snow.
No sooner \_\_\_\__ arrived at the station than it began to snow.
Those of you _____ have the time should make the commitment to register in language courses.
Those of you \_\_\_\__ have the time should make the commitment to register in language courses.
_____ uncomfortable it may be, proper protective gear absolutely must be worn by anyone using the equipment.
\_\_\_\__ uncomfortable it may be, proper protective gear absolutely must be worn by anyone using the equipment.
After discussing the terms of the new health-benefits contract, _____ management and employees were satisfied.
After discussing the terms of the new health-benefits contract, \_\_\_\__ management and employees were satisfied.
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