The accident happened at nine o’clock in the morning ____ we were all busy with our work [ ]

the flower(花)! It’s very nice.—Yes, it is.

It is politely requested by the hotel management that radios __________ after 11 o’clock at night.[ ]

After eight hours’ hard work, the firemen finally_________theforest fire.

237. Our teacher will _____ our class apicnic at the riverside tomorrow if the weather permits.