The study surveyed 500 families and found that the main ________ problem people suffered was tiredness, followed by loneliness and anxiety.
162. Many countries are increasing their use of natural gas, wind and other forms of ______.
163. _____ you are leaving tomorrow, we can eat dinner together tonight.
164. --- Jane, whom would you like to talk with at the end of the lecture? --- Mary. The lady ________ Miss White.
165. The headmaster ______ a new teacher ______ the students just now.
166. Kunming is said to be a city of spring all the year round. But the weather there ______ unpleasant.