When your parents haven’t ____your letter for a long time,they will worry about you.

– The cake is delicious.——Well, at least it is ___________ the one I baked last week.

My aunt is a writer. She ______more than ten books for 30 years.

uld move quietly up to the sparrow on a smalltree just to get a better look, her face __________ with childlike expressionsat one of God’s simple wonders

Farmers in China began to usetractors cattle for farming work.