Heads from different countries gathered in Amsterdam and President Xi jinping _____ a speech on nuclear safety.

I ________ in London for many years，but I've never regretted my final decision to move back to China.

I am really sorry if my comments on the matter ____ you. 

When the question _____ at the meeting, no one could answer it.

 American women were______ the right to vote until 1920 after many years of hard struggle.