49. She set out soon after dark ____ home an hour later.
A. arriving B. to arrive C. having arrived D. and arrived
48. The first textbooks ____ for teaching English as a foreign language came out in the 16th century.
A .having written B. to be written C. being written D. written
47. The visiting minister expressed his satisfaction with his talks, ____ that he has enjoyed his stay here.
A. having added B. to add C. adding D. added
46. _____ down the radio ---- the baby’s asleep in the next room.
A. turning B. to turn C. turned D. turn
45. How about the two of us ___ a walk down the garden?
A. to take B. take C. taking D. to be taking
44. Charles Babb age is generally considered ____ the first computer.
A. to invent B. inventing C. to have invented D. having invented
43. The computer center, ___ last year, is very popular among the students in the school.
A. open B. opening C. having opened D. opened
42. “Can’t you read?” Mary said ____ to the notice.
A. angrily pointing B. and point angrily C. angrily pointed D. and angrily pointing
41. ---- I thought you had planed to practise the piano today.
---- I did nothing but _____ letters all day.
A. write B. to write C. wrote D. writing
40. I would appreciate ____ back this afternoon..
A. you to call B. you call C. your calling D. you’re calling