Look at this group of people ______ beach volleyball.
C
现在分词作定语,表示正在进行的动作。
Thehousewasquietinthenight,________theoccasionalcoughingfrommythroat.
Welookforwardto______thegoodsinthefourthquarter.
_______thefirstlanguageisusedintheteachingofthesecondlanguageintheGrammar-TranslationMethod.