Lots of the scientists in our country are working hard to ____the planet Mars .

Have you watched the popular TV play called Descendants of the Sun The main character Captain Yoo Si-jin in the play is so handsome.– Really When ______ it

ised them to take a rest, but theyinsisted _______ the work

–Hey! to learn the namesof college you ____ be interested in

I’ve lost the telephone number of my friend Jane. I had written it down.[ ]