Lookatthisgroupofpeople______beachvolleyball.
C
现在分词作定语，表示正在进行的动作。
重写句子：Ihavecheckedmydocumentsseveraltimes.Istillcan’findttheproblem.(compoundsentence)
重写句子：WelivedinasmalltownwhenIwasasmallchild.WemovedtoShanghailater.Myfatherlandedabetterjobthere.(compound-complexsentence)
Weareallconcerned_______hersafety.
重写句子：Theteacherreturnedthehomework.Theteachernoticedtheerror.(complexsentence)