选C the foreign guests为先行词,whom是the foreign guests的宾语,指代the foreign guests 主句为the foreign guests were warmly welcomed at the airport. 而从句为 most of the foreign guests were goverment officials. 从句只是补充说明的
C the foreign guests为先行词,whom是the foreign guests的宾语,指代the foreign guests 主句为the foreign guests were warmly welcomed at the airport。 而从句为 most of the foreign guests were goverment officials。