When chatting with her on the mobile phone, the battery _ dead suddenly.
When he was alive, the old scientist used to say that knowledge __from practice and he gained his experience by doing a lot of practical work.
He __articles for our wall-newspaper these three years, and he __about forty articles.
The children __very quiet;I wonder what they __up to.
Jim talked for about half an hour yesterday. Never__ him talk so much.
— __ Betty this morning? — Not yet, but she is sure to be here before noon.