_______ is the girl? – She’s my friend, Helen.

I think English is ______ useful language, and it’s also ______ important language.

Do you think that we should prepare for our exam in advance?– Of course. _________.

If it_________ tomorrow, I’ll go birdwatching with my father. —–That’s a good idea.

What were you doing when I called you at 8 p.m. yesterday?—I the piano at that time.