目前，我国政府重点监控、查禁的毒品是： （ ）

一个三角形三条边的长分别是    $\frac{1}{3}$  米、 $\frac{5}{9}$  米、和 $\frac{7}{18}$  米，这个三角形的周长是多少米？

请你把诗句补充完整。

    When I was in the middle school, I was good at many subjects____(除了) English. It was a little difficult for me and I often made____(错误) in the test. I felt very sad.

    Luckily, my English teacher Miss Li was ____（相当地）kind. She advised me to buy a dictionary and____(提议，提出) to help me solve____(主要的，基础的) problems. Miss Li said that I ____(应该) speak English aloud and read ____(大量，众多) of English books. With her help, my English improved____(迅速地,快地). It was much____(更简单) for me to remember the words than before. And I became one of the actresses in the school English show at ____(终于，最后).

    I was thankful to my dear English teacher, Miss Li.

下列句子中加横线的词语运用有错误的一项是（  ）。