Thefactthatsomanypeoplestillsmokeinpublicplace_______thatwemayneedantionwidecampaigntoraiseawarenessoftheriksofsmoking.

We are interested in the weather because it _____ us so directly ------ what we wear, what we do, and even how we feel.

Morewindpowerstationswill____________tomeetthedemandforcleanenergy.

__________ the convenience of digital payment, many senior citizens started to use smart phones.

We’d better discuss everything _______ before we work out the plan.