With so much noise outside, I couldn’t my work and wondered what was happening.

Not until he met with the difficulty _______ the importance of group work．

_______, Sharon couldn’t find her lost wallet.

he time came to make the final decision for a course, I decided to apply for the one that _________my interest.

Do you have any problem in getting accustomed to________in the north?— Yes. It is too cold in winter. [ ]