It was recommended that passengers _____ smoke during the flight.
A
暂无解析
_____ at in this way, the present economic situation doesn't seem so gloomy.
Although____Spanish，heattendedthecourse.
ProfessorJohnsonissaid_____somesignificantadvanceinhisresearchinthepastyears.
Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.