He was ill, _________ he still went to school on time.
—Our country _____ progress in science and culture in recent years.
—What did our geography teacher say? —She told us that the earth _____ around the sun.
When we went into the park, we saw someone _____ Chinese Kungfu.
—How about going hiking this weekend? —Sorry, I prefer _____ rather than _____.
—Have you ever _____ Mudanjiang to see the Jingbo Lake? —Yes, I have.