______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.
When we were young, every evening my brother and I ___ stay at home waiting for my mother?
—Are you satisfied with what he did? —No. It couldn’t have been _____.
This year __________ to be another good one for harvests.
Perhaps it is true that nobody in the world knows exactly how the earth __________.
—Why don’t we choose that road to save time? —The bridge to it __________.