1.Jim was in his Grandpa's house just now. (对划线提问 划线的是Jim)
_ _ in his Granddpa's house just now?
句用的“just now”暗示动词应当用过去时态，因为对主语提问，应该用人称代词的主格who,所以划线部分该填who was.
2.Ben is giving his sister some fish as her birthday present.(改同义句）
Is giving属于进行时表将来，所以可以为“打算…”，当然也可以针对give的双宾语进行同义转换，即give sb. st和give sth. to sb的转换。所以可以改成Ben is giving some fish to his sister as her birthday present.也可以改成Ben is about to give his sister some fish as her birthday present.以及其他表打算做某事的诸多句型都可以，开放型问题，答案不唯一。
3.This is my uncle's present.(对划线提问 划线的是my uncle's)
_ _ is this?
对所有格提问，用whose，所以就是whose present。
I'd like a mask as my birthday present.(对划线提问 划线的是a mask)
I’d like 是I would like的缩略形式，划线部分a mask是词组动词would like的宾语。对宾语提问，要么which，要么what。有选择范围就用which，没有就用what。本句显然没有，所以提问就该用What would you like…
4.She drew many pictures at the Art Festival.(对划线提问。划线的是drew many pictures)
划线部分是句子谓语，而且drew是过去式，所以当用What did she do…
5.Suhai made a kite last Wednesday.(改为一般疑问句）
_ Suhai_ a kite last wednesday?
原句made是过去式，提问应该用did,有了did，后面动词就该用原形了，所以就是Did Suhai make a…
哪句不懂再具体问哈
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