We always don't realize time goes by, ________we're playing games.
A.while B.although C.unless D.if
—Dad, I think that we can't reach the top of the mountain.
—________. Though it's hard, just stick to it.
A.I will give you a hand B.It takes time
C.Sounds like fun D.I think so
—People like the houses whose windows are south facing.
—______.This kind of house can get plenty of sunshine.
A.Luckily B.Gradually C.Exactly D.Generally
—The price of pork （猪肉）________so quickly these days.
— I agree with you.
A.affords B.rises C.improves D.spreads
My brother's dream has already come true. I believe if I work hard I can achieve________.
A.I B.me C.my D.mine
—Listen! What is this sound?
—It is________ doubt Frank is practicing singing.
A.on B.in C.without D.about
