In the first book, Lyra’s scientist father makes ______ possible to enter other worlds.
It was 5 o’clock __________ the visitors finally arrived at Pudong International Airport.
You made the same mistake second time, dropping “n” in the word “running”.
—I’m afraid I can’t finish the book within this week.—__________.
The hunter insisted that he _____ a tiger and that a searching team ______ to hunt for it.
You have to keep on learning if you want to keep ______ with the development of modern science and technology.