Across the bridge and _______a vast carpet of green land stands the King’s college, the largest and most beautiful building in Cambridge.

______ returning home, she found a note _________ to the door, reading: “Call in later.”

Videos, recordings and other learning aids are usually used          textbooks in language learning.

_____ his arrival at the airport he was greeted by many teenagers holding flowers in their hands．

For a long time, he hesitated whether he should tell us ____ what had happened.