Many nations have promised to reduce greenhouse gas emissions, but are falling short of the _______ reduction of 25 to 40 percent of 1990 levels.
. . Few visitors leave Rio feeling _________.
. He made a big mistake, and _________, he lost his job.
. The forest guards often find campfires that have not been _________ completely.
. My mother ______ live in the country by herself, but now she got used to ______ together with us in the city.
. Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.