选择词组完成填空，使语句意思完整。

A. falling apart        B. focus on       C. looking forward to       D. other than               E. sign up for

【小题1】Inca builders cut stones to exact sizes so that nothing was needed to hold walls together ________ the perfect fit of the stones.
【小题2】My dad and I are both ________ going to the Shaanxi History Museum, because my dad loves history and I have heard that this museum is known as a “Chinese treasure house”!
【小题3】My adviser recommended that I should ________ advanced literature because I like English and I’m good at it.
【小题4】Spending too much time online is unhealthy and makes it very difficult to ________ other things in life.
【小题5】The team that Lang Ping had built was ________.