A student in my class said to me, " If I            our math teacher, I          make math learningeasier and more interesting instead of giving the kids much homework to do every day. "

A. were; would  B. am; will    C. was; could

读下图，回答问题。

（1）黄河发源于巴颜喀拉山，注入①_____海，图中所示的②是被称为“塞上江南”的______  __平原。

（2）读右图分析，从河口到孟津，含沙量___      ____（增加或减少），原因是该河段流经水土流失严重的_________高原。治理水土流失的主要措施是 _____________________________________________。