---Do you prefer _______ to Beijing by air?---I would rather _______ a train.
-How do you know I’ve just come back from the beach? -There is _____________ sand in your shoes.
-It rains again! -Yes. The weather in Chongqing this summer is much cooler than _______in Chengdu.
-Will you keep these old toys? -Of course. They hold the sweetest __________ about my childhood.
-We had _______ unusual trip in South Korea by ________ ship. -Excellent!
—Lisa, this is your schoolbag. _____________. —Thank you.