你想知道你的朋友有多少只钢笔时，你可以问（）

A.Howwasyourholiday

B.Whenwasyourholiday

C.Howwasyouholiday

A.What's this

B.What's that

C.What are they

A.What's that

B.What color is it

C.What are these

A.Howlongisourclassroom

B.Howfarisourclassroom

C.Howwideisourclassroom

A.whatareyougongtodothissunday

B.whatdoyoudoonsundays

C.whatdoyouhaveonsundays

A.whatdoyoulike

B.whichseasondoyoulikebest

C.what'syourfavoritesport

A.It is in the box

B.Is it in the box

C.Where is the box

A.What are you going to do during the vacation

B.What are you going to do tomorrow

C.Where are you going to do during the vacation