3. A. has to　　 B. has　　　　　　 C. able to　　　 D. will

2. A. In　　　　　 B. At　　　　　　　 C. To　　　　　　 D. On

1. A. was B. being　　　　 C. to be　　　　　 D. be

15．A。旧词新意。

Mr. Wang teaches English in a middle school. He likes his work very much. He wanted　 1　 a teacher even when he was a young boy.

　There are six classes in a school day at Mr. Wang’s middle school. Mr. Wang teachers five of these six classes.　 2　 his "free" hour from 2 to 3 in the afternoon, Mr. Wang　 3　 meet with parents, check students’ homework and　 4　 many other things. So Mr. Wang works hard from the moment he gets to school early in the morning until he leaves for home late in the afternoon, and his "free" hour is not free at all.

　In his English lesson, Mr. Wang sometimes teaches poems (诗). He likes poems very much, and he likes Li Bai’s poems　 5　 of all.

　In his fifth class today, Mr. Wang taught a poem. He wrote the poem on the blackboard and read it. As soon as he finished　　 6　 the poem, the students began to ask questions. He answered all the questions. Then he asked his students to talk about the poem.　 7　 one wanted to stop when the bell rang.

　8　 home, Mr. Wang thought about the fifth class. He was happy about what he did as a teacher. Every one of his students　 9　　 the poem. When they started to talk, they forgot about the time. He did not have to make them　 10　 . He only had to answer their questions and help them understand the poem.

14．B。根据文意，一种语言如果没人使用，就会灭亡。

13．A。send messages为固定搭配，表示“发送信息”。

12．C。think为及物动词，这里what做think宾语。

11．A。

10．B。ouch表示疼痛，故推测是东西砸到了脚上。Fall是不及物动词，故不选。

9．B。