These teenagers don’t know much of the world yet; that’s why they are so easily _________ .
—I wish I __________ the meeting. —But you didn't.
The doctor telephoned to say that he couldn't __________ the meeting because he had to look after a patient.
More highways have been built in China, __________ it much easier for people to travel from one place to another.
—Do you know the tower __________ in the heart of the city? —You mean the one __________ from the Ming Dynasty?
If we want to arrive at the village on time, we'd better __________.