Could I use your rulerI left mine at home.—Yes, you______．

My son is learning English. What dictionary shall I buy for him— What about this one It is for beginners.

It is amazing that the little boy can swim ________the river ________100 meters in width

Water ______ into steam if it is heated to its boiling point.

so cold! Why are your windows still open —- Oh, they _______．