__________theconvenienceofdigitalpayment,manyseniorcitizensstartedtousesmartphones.
AfewmonthsafterhehadarrivedinChina,Mr.Smith___________inlovewiththepeopleandculturethere.
Nowadaysthe___________fortravellingisshiftedfromshoppingtofoodandscenery.
Willallthose_____theproposalraisetheirhands?
Scientistshaveobtainedmoreevidence___________plasticisfindingitswayintothehumanbody.