—Do you know the most ancient city in China—Xi’an well?—No,this is the first time I ________ here.
Look! There are lots of ________ birds flying over the trees.
--Can you finish the writing on time? --_________.
—Id like a pen which _________ well.—Will this one _________?
It was not until liberation that _________ to his hometown.
—Why not go out for a walk before breakfast? —Oh,yes. _________ is my favorite time of day.