You look so tired. You _________ have stayed up again.
| A．should | B．can | C．may | D．must |
She won’t be able to come next week, because she _________ herself in Mount Tai then.
| A．enjoys | B．will be enjoying | C．is enjoying | D．Enjoyed |
Hearing loss in a large number of teenagers______ caused because of their listening to loud music.
| A．is | B．has | C．are | D．have |
_________ from Adelaide to Darwin and you’ll observe some of Australia’s most beautiful landscapes.
| A．Traveling | B．To travel | C．Traveled | D．Travel |
It is in the year of 2010__________ a severe drought hit Yunnan province.
| A．until | B．that | C．before | D．when |
Mr. Li arrived at the Wuguang train station twenty minutes ago, but the train to Guangzhou ____________ yet.
| A．hadn’t come | B．won’t come | C．hasn’t come | D．didn’t come |