He is very friendly _____, and I believe we will becomefriends soon[ ]

This maths problem is_______ easier but______ interesting than that one.

You will succeed in the end _____________ you give up halfway

acher talked with Jack, _______ problems waspoor study habits.

（题文）It was a long time since the girl last saw her parents. No wonder she was not _____ excited when they came.