Better take a break. You ______ the Internet for more than three hours.
A.are surfing
B.surfed
C.have surfed
D.have been surfing
试卷相关题目
- 1By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course.
A.are
B.will have been
C.have been
D.will be
开始考试点击查看答案 - 2You _____ the results of the experiment by next day.
A.would have learnt
B.have learnt
C.will learn
D.will have learnt
开始考试点击查看答案 - 3According to the Ministry of Health, by May 1, 2003, the total SARS deaths on the Chinese mainland_____to 170.
A.has come
B.had reached
C.increased
D.had climbed
开始考试点击查看答案 - 4By the time you arrive home, I_____, so please don't make any noise when you come in.
A.shall have been sleeping
B.shall have slept
C.shall sleep
D.shall be sleeping
开始考试点击查看答案 - 5The conference _____ a full week by the time it ends.
A.must have lasted
B.would have lasted
C.will have lasted
D.has lasted
开始考试点击查看答案 - 6— I have got a headache.— No wonder. You ______ in front of that computer too long.
A.work
B.are working
C.worked
D.have been working
开始考试点击查看答案 - 7— Why are you so late? I _____ for more than an hour. — I'm terribly sorry. I overslept and missed the bus.
A.am waiting
B.was waiting
C.have been waiting
D.will be waiting
开始考试点击查看答案 - 8— Did you find the missing couple in the mountain yesterday? — No, but we ____ to get in touch with them ever since.
A.have tried
B.have been trying
C.had tried
D.had been trying
开始考试点击查看答案 - 9I wonder if John has forgotten my number. I _____ him to call me for the past two hours.
A.was expecting
B.had expected
C.have been expecting
D.expected
开始考试点击查看答案 - 10Police are now searching for a woman who is reported to ____ since the flood hit the area last Friday.
A.have been missing
B.have got lost
C.be missing
D.get lost
开始考试点击查看答案