— Why do you look so worried?— My MacBook Pro broke down and my paper ______ unfinished since.
Where and when to go for the holiday still ______.
________ I came, the city wasn’t so beautiful.
Rather than _______ on a crowded bus, he always prefers ______ a bike.
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
His singing career began to ______ in the late 1990s.