As a child, I was _________to keep quiet when my parents were discussing something, while parents nowadays often ask for their children’s opinions.
The playnext month aims mainly to show the local culture.
The hospital is ______ signs telling patients that it can offer only limited services.
You really need to go out and get some fresh air and sunshine. You ______ overworked during the last two weeks.
—How long do you think it will be ________ we win the football World Cup? —Perhaps twenty years.
Silk from China found its way to India, the Middle East and Rome, _______ spices and glass, which was not known to China.