What are doing here? I ________ for you for ages!

Playing balls together is a kind of activity_____ every playerneeds to be well-cooperated together

President Xi Jinping _____ visited thenavy troops and urged to strengthen naval force on April 9, 2013.

I wonder what makes him a good English teacher.—He ________ as a volunteer in the UK for three years, which helps with his work a lot.

can I wake up so early—Set the alarm at 5:00 am., you will make it.