It is surfing on the Internet late into the night that my getting up late.[ ]

all know, it was _________ that resulted in the terrible car accident.

News came from the office __________ Wang Lin had beenadmitted to Beijing University.

so sorry to have come late for themeeting.— It is not your fault. With __ rush-hourtraffic and __ heavy rain, it is no wonder you were late.

Scientists are convinced _______ the positive effect of laughter _______ physical and mental health.