21．－Put ______ waste bag in the dustbin.
－It’s not _________ waste bag. It’s my shopping bag.
A．a, a B．the, the C．the, a D．a, the
22．－Do you think the weather is good enough for an outing?
－Yes, you couldn’t hope for ___________ at the time of the year.
A．the nicer day B．a nicer day C．the nicest day D．a nice day
