8. He was so deep in thought, thinking of the problem ______ he knocked into the tree without noticing it.
— Has Tim started? He said he would join in the party. — He ____.He is a man of keeping his word.
He once studied in Zhejiang University, ________he went abroad for further study.
Since Margot found it difficult to settle in a new place, she felt ______ that the family had to move.
Why not try your luck downtown, Bob? That’s __________ the best jobs are.
The best ways to go to this small town ____ by bus _____ by bicycle.