44. I bought this computer when I was 15.
A. I used this computer when I was 15.
B. I have used this computer for 15 years.
C. I have bought this computer since I was 15.
D. I have had this computer since I was 15.
45. It is convenient to learn with smart devices.
A. Learn with smart devices is convenient.
B. Learning with smart devices is convenient.
C. Smart devices are convenient to learn.
D. Smart devices can be learned conveniently.
46. Everyone was disappointed with the results.
A. The results were disappointed to everyone.
B. Everyone was disappointing with the results.
C. The results were disappointing to everyone.
D. Everyone and the results were both disappointing.
47. E-readers help us read texts taken from the Internet easily.
A. E-readers allow us read texts taken from the Internet easily.
B. E-readers allow us to read texts taken from the Internet easily.
C. E-readers allow us reading texts taken from the Internet easily.
D. E-readers allow us can read texts taken from the Internet easily.
48. The accident happened on my way to London.
A. I travelled to London when the accident happened.
B. I travelled to London when the accident was happening.
C. I was travelling to London when the accident happened.
D. I was traveling to London when the accident was happening.
49. Computers can help store information.
A. Computers are useful for storing information.
B. Computers are useful for stores information.
C. Computers are useful storing information.
D. Computers are useful for store information.
50. Old clothes are not totally useless.
A. It is useless to buy old clothes.
B. You cannot use old clothes at all.
C. Old clothes are totally useful.
D. Old clothes can be useful.