Today the canal is still being used. Ships can be seen moving on ______ water now and then. But it is no longer ______ busy water highway.
They thought the meeting was ________great importance.
________the birthrate down by 10%,the number of the population has decreased.
The army went ________the thick forest and at last came to a little river.
You have made several mistakes in your exercises but ________you have done well.
The water lever has risen ________10 cm and up to 100cm in the last days.