— I ‘ll ask our physics teacher to explain Newton’s Second Law of Motion, which she taught us yesterday.— That’s just _______ most of the students haven’t understood.
I could ______ my friend though there were so many people in the railway station.
After she put on her dress, she fastened a belt ______ around her waist.
After years’ preparations, the first Chinese music website ______.
The poor mother ______ and wept when she heard the news that her five-year-old son had been kidnapped.
. His colleagues ______ him though he himself didn’t think he had done anything special.