The hotel ____ me ＄50 for asingle room during one night.

You look so worried, what’s wrong -More andmore people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.

Bake is intelligent and experienced. — That is ________ his advantages lie in applying the post.

Do you know ______—At 10:00 o’clock tomorrow.

My mother often tells me to study hard. Shesays hard work _____ success.