They suddenly returned ________ a rainy day.
It takes me a lot of time _________ there by bike.
—Can you go to the mall with me this Sunday?—________, because I have to babysit my sister.
—I have a toothache.—You should .
—________ does Lucy go to school every day? —She walks to the bus stop, then takes the bus.
We __________ sightseeing tomorrow.