题目内容：
根据下面材料，回答题：Mr. Wang teaches English in a middle school. He likes his work very much. He wanted ____76 ____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 teaches five of these six classes.____77 ____his "free" hour from 2 to 3 in the afternoon, Mr. Wang ____78 ____meet with parents, check students' homework and ____79 ____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 ____80 ____of all.
In his fifth class today, Mr. Wang taught a poem. He wrote the poem on the blackboard and readit. As soon as he finished ____81 ____the poem, the students began to ask questions. He answered all thequestions. Then he asked his students to talk about the poem.____82 ____one wanted to stop when the bellrang.
____83 ____home, Mr. Wang thought about the fifth class. He was happy about what he did as ateacher. Every one of his students ____84 ____the poem. When they started to talk, they forgot about thetime. He did not have to make them ____85____. He only had to answer their questions and help them un-derstand the poem.
________ A．was
B．being
C．to be
D．be
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