________ global energy safety, all the countries have been called on to take joint efforts ．

______ disturbed, I spent three hours locked in my room, preparing for the next day’s job interview.

I got to the office earlier that day, _______ the 7:30 train from Paddington.

___in the early 20th century, the school keeps on inspiring children’s love of art.

The officer gave orders that anyone _____ a gun should be reported to the police station.