Have you met Luke recently？
Yes， I （碰巧看见他） in the science museum yesterday afternoon．
Jim， check your homework before you （上交它）．
Have you ever used Meitu？
Of course． It's one of the most （广泛地） used free photo editing apps in the world．
Some foreigners living in our city will be （邀 请） to share their life experiences with us．
Do you like watching these TED （演说） online？
Yes， I've learned a lot from them．