下列各句中，标点符号使用正确的一项是（ ）

下列各句中，加点的词语运用错误的一项是（）

__________ volunteers will be needed for 2014 International Horticulture Exposition (国际园艺博览会) in Qingdao.— Let’s go and join them.

as a strict but good captain,_________ who, usually, took care of the sailors on his ship

Here _____. This is our classroom.