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[音频]

A. He has to sit at the computer for half an hour.
B. He will stop to enjoy a coffee break.
C. He will finish his report soon.
D. He cannot afford to have a coffee break.

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[音频]

A. She was just telling a joke about quitting her job.
B. She wasn't satisfied with her salary.
C. She was fed up with counting money at her job.
D. She was to quit her job and look for an accounting job.

树洞填充可用以下材料__________。

A. 水泥砂浆
B. 沥青混合物
C. 聚氨酯塑料
D. 木块、软木

树种处理的主要步骤是________,________,整形,________,涂漆和________。

清理大树洞时,应全部清除变色木质部。

A. 对
B. 错

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