根据句意和汉语注释,在横线上写出单词的正确形式。
While I was doing an ____________(实验), a glass dropped and was broken.
The guide spent the whole afternoon ____________(解释) to those angry tourists.
Mum felt worried about my brother’s strange ____________(举止).
It is reported that about two thirds of the workers voted to ____________ (接受)the offer.