His formal style. of speaking was ________(appropriate) to the occasion and people laughed at him.
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田径跳跃运动项目主要有助跑、_______、________和落地四个技术环节组成。
The directors were trying to get rid of her,but all the staff were ________(support) of her.
从技术原理看,器械投掷的远度取决于出手的高度、________、________、三个因素。