[单选题]—What are these?—____________ are desks.
[单选题]—What are these?—____________ are desks.
This
Those
They
It
指示代词this/that, these/those在问句中指代物体时, 其答语分别用it, they代替, 故选C。
[单选题]____________ bikes are red. ____________ are blue.
We; They
Our; Their
Our; Theirs
We; Their
bikes是名词, 其前需用形容词性物主代词, 故排除选项A、D。theirs是名词性物主代词，可作主语，故选C。
[单选题]—Mike, who helped ____________ make the paper plane?—Nobody! I made it all by myself.
your
yours
you
yourself
your意为“你（们）的”；yours意为“你（们）的（东西）”；you意为“你（们）”；yourself意为“你（们）自己”；此处作为动词help的宾语，故用宾格形式you。句意：——迈克，谁帮你做的纸飞机？——没人！我自己做的。
