Jack has a good habit of keeping a diary every day;      he is very good at writing.

27．My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive . 

—You don’t see the professor from Singapore quite often, do you? —No, we only meet ______．

There was such a long queue for coffee at the interval that we_________gave up.

The special dance，Gangnam Style，is ________ popular all over the world and was even performed in the White House.