It is desirable that the hotel manager ____ to call the maintenance staff every 6 months to clean up the air conditioners. A. remember B. will remember C. must remember D. remembers
A. remember
The Principal demanded that the heaters ____ immediately. Winter is coming! A. are repaired B. be repaired C. were repaired D. repair
B. be repaired
It's vital that the government ____ more on environmental issues. A. focuses B. must focus C. should be focused D. focus
D. focus
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