It’s bad for us to __________ at night.A. stand up B. take up C. stay up
—Would you mind my opening the window? —_______ . It’s cold today.
My cousin has been learning English _____she was six years old.
—What did she______? —She said she ______to Beijing for a trip.
We will go to the mountains,if it______this Saturday.
—Were you at home at 9:00 pm yesterday? — Yes, I _______ for a call at that time.