—When did the Greens come to China?—They_____ China for seven years.
The group of people _____ the hotel after walking for 6 hours. They needed to have a rest.
The little boy could _____ speak when he was 2 years old, but now he can sing wonderfully.
You will fail the exam _____ you study harder than before.
Peter’s teacher was very happy because he made the _____ mistakes in this exam.
Our classroom is on the _____ floor. We can hear the students singing on the fourth floor.