The Forbidden City attracts a _____ stream of visitors every day, especially during national holidays.
.The subway timetables are well planned in Norway. Seldom ________ wait very long.
.________ being very convenient to shoppers, plastic bags also cause serious white pollution.
.It is easy enough to download and copy, but you should at least write ________ by yourself.
.I find singing Karaoke ________, for it takes my mind off my work for a while.
.Don’t cry over your lost friendship any more. It ________ be helped.