He fell asleep immediately last night; he must ________ （be） very tired.
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A great number of small power stations ________ （set up） in their countysince liberation.
队员a5掷界外球时，球触及篮圈后弹回，被站在场内的a6接住并投中篮，裁判员判2分或3分有效（）
Those who’d like to visit the exhibition ________ （sign） your names here.
对做投篮动作的队员犯规，如投中则得分有效，再判给该队员一次罚球（）
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