1.用适当的宾语从句引导词填空：I couldn't find out ______ruler it is.So I g

1.用适当的宾语从句引导词填空：I couldn't find out ______ruler it is.So I gave it to the teacher.
2.I wish I () longer this morning,but I had to get up and come to class.
A.could have slept B.slept C.might have slept D.have slept
3.I've not decided() to join you yet.
A.if B.what C.which D.whether
4.My father told me_____________________.(熟能生巧)
5.脑筋急转弯：How long is a shoe,usually?