Some so-called climate travelers _______ in one place for a few months and then move on to some other places as the weather changes.
. I have taught hundreds of students,___________ having been working in their fields for years.
______, he still cannot make himself understood.
_________ is unknown to us all.
The village has developed a lot ______ we learned farming two years ago.
-----I hope to go to Beijing with you.-----If so,your holiday arrangement must________mine.