Facing the poor grades, Maria is wondering what it ___ to learn English well.
We expected _____ no problem with the publication of the book by now, but is still being printed.
Sometimes we believe what we see _____ the reality may be different.
The women carrying babies, come in first, _____?
We can live without clothes, but food and drink are _____.
—Hi, Dave! What’s up? —Oh, _____. What are you doing recently, Cathy? —Chatting online a lot with friends.