With the development of science, more new technologyto the field of IT

The opening between walls was very narrow; it’s veryhard for soldiers to _______ through.

Could I have a word with you, mum? — Oh, dear, if you ______.

she burst into tears

Zetao easily proved himself to be a rising star with four gold medals during the 17th Asian Games, ______was held in Incheon, South Korea last year.