fill the blanks using the correct form of words. 1．a balloon _____________（膨胀） as it is filled with air. 2．salt and sugar ________________（溶解） in the water. 3. tom, can you see something red ____________（漂浮） in the distance on the water? 4. what is her r____________ to the news? 5. there was little pollution at the early ____________(阶段)_in our history. 6. there is going to be snow in ____________（局部）areas in the northeast. 7. different ______________（结论）can be drawn from the facts.
