泡沫泥浆
参考答案:
气体(空气和天然气)和粘土均匀而稳定地分散在水中形成的水基泥浆。
They won’t buy new clothes because they__money to buy a color TV set.
A.save
B.are saving
C.has saved
D.were saving
_____ does he go to school on weekdays? [ ]
A. What
B. What time
C. Why
D. What about