Hi everyone! Good news. A book sale.____will people drive cars in space? Will you meet traffic ____? You'll get answers from our books. Are ____ interesting for you? They can do heavy work. You ____enjoy short working hours. We've got some storybooks about them. What's the best way to buy products at very good prices? Our books will tell you something about online ____? 

    Welcome to the playground this Saturday.

    Have a nice day!

食物夏天比冬天更容易腐败，是因为具备了细菌生长需要的____ 条件，牛皮革衣服比人造革衣服更容易长霉是因为具备了霉菌所需的____ 条件。

打开抽屉需要向外____，关上抽屉需要向里____。