Lucy is unhealthy because she ______ has enough sleep every night.
--If I work hard at my lessons from now on, can I do well in them?---Sure. ___________.
--- Kitty, do you know ______?---Sure, about forty minutes.
Frank often wears a mask _____ he can keep fit in the foggy and hazy (霾) weather.
When the sun ___ in the east, the little hero tried hard ___ the red flag to the top of the pole.
—_______ do you like _______ the picture on the wall?—The colour.