The microphone enabled them to keep in touch, in other words, it made it _____ for them to contact each other.

Worrying too muchis unnecessary.It doesn’t change ________. —Exactly right.Thereare ________meaningfulthingstodo.

I theoffice yesterday afternoon when a stranger came in with a boy．

I really didn’t understand____ made my son so sad this morning.

When will the 70th anniversary ceremony for our school ________? All the students and teachers are waiting for it.— Well, in my opinion, at 9 am.[ ]