下图描述的是2012年7~12月某商品的价格走势。根据该图,下列理解正确的的是①生产者可能会扩大该商品生产 ②该商品很可能供不应求③该商品的互补商品需求量会有所增加 ④该商品的替代商品需求量会有所减少
This book ______ Tom’s father’s, because his name is on the book.
This question is ______ easy, all the students can answer the question.
I don’t know _________.
When we practice speaking English, we often end up _____ in Chinese.
----_____do you improve your listening? ----I improve it ______ listening to tapes. A. How; with B: What; withC: How; by D. What; by