He’s teaching me French my teaching him Chinese

Rather than _____ on a crowded bus, he always prefers ______ a bicycle. [ ]

The discovery of these tombs is _______ for scholars’ studying the history of the Tang Dynasty

_____ the terrible scene of the traffic accident, the little boy burst out crying[ ]

Sonia, is this your dictionary—No, it’s not ______. Ask Alan, Maybe it belongs to ______.