When they saw their teacher into the classroom, they stopped at once.
______Jenny is kind, ______we all like her.
—Who ______ is on the second floor? —Jenny, my sister.
—Why are you in such a hurry, Mike? —There ______ an NBA basketball game in ten minutes.
I usually stay ______ bed ______ Sunday morning.
—Who helped Li Lei with his English? —______, he learnt it by himself.