common
问题Although there is no cure for the common co1d , doctors believe that vitamins can he
Althoughthereisnocureforthecommonco1d,doctorsbelievethatvitaminscanhelppreventthem.(翻译)
问题Today it is common to access the Internet from a variety of（）devices like smartphones and
TodayitiscommontoaccesstheInternetfromavarietyof（）deviceslikesmartphonesandtablets.A.mob