John is collaborating with mary in writing an article.

A．cooperating

B．competing

C．combining

D．arguing

[单选题]–Is Mary(John) there?–______A.Speaking B.I’m not MaryC.Who are you D.Mary i

[主观题]B．oth Mary and John are students．（改为否定句）

[单选题]John: Mary isn't going to New York next week.Rose: ______

[单选题]C．art: Hi,Mary, are you free tonight?Mary: _________. Cart?C．art: Shall we have a game of chess?A． What about itB． What of itC． What forD． What is it

[单选题]Mr. Smith is (collaborating)with Johnson in writing an play.A.cooperatingB.

[单选题]Mr. Smith is [collaborating]with Johnson in writing an play.A.cooperatingB.

[单选题]Mary's parents are worried about Mary because no one was aware ______ she had gone.A． of whereB． where thatC． the placeD． where of

[单选题]Is Mary there?- _________。A.Speaking.B.I'm not Mary.C.Who are you?D.Mary is

[判断题]Supply chain management consists of firms collaborating to leveragestrategi

[判断题]Supply chain management consists of firms collaborating to leveragestrategi