. Inoculation(接种) of the H1N1 vaccine ___ launch another round to weak people in February,but due to a global shortage, that has not happened yet.
I often have conversations with John over ______ telephone, while I keep in touch with Tom by ______ letter.
Time is limited and let's come______ to the point.
Can you imagine the trouble that they had ___ the orphan in the terrible years?
It is the second time that I____ in Beijing
the deadline approaching, we found ourselves a loss about what to do.