.Urban crowdedness would be greatly relieved if fares________on public transport were more reasonable.

Where is Mike —He _____ to New York on business. He ______ the airport at 5 in the morning.

Can I use the telephone on the table，sir–Under no circumstances _________ to use the telephone in the office for personal affairs．

Do you know what time you’ll be back this evening, Eric? —-I’m not sureIt depends on_______ the interview lasts

To their disappointment, they found the lecture given by the professor difficult__________.