Before making your speech, you'd better ______ your thoughts and ideas.
Though we don't know what was discussed, yet we can feel the topic __________.
—What is the price of petrol these days?—Oh, it __________ sharply since last month.
—Why does the lake smell terrible?—Because large quantities of water __________.
Progress __________ so far very good and we are sure that the work will be finished on time.
For many years, people __________ electric cars. However, making them has been more difficult than predicted.