By the time students complete that course they know two computer languages and have no trouble （）their own programs.
A: to write
B: written
C: write
D: writing
A: to write
B: written
C: write
D: writing
举一反三
- Remember to send me a photo of us next time you________to me. A: write B: will write C: have written D: are writing
- It was her first time ( ) and direct a play. A: to write B: be written C: write D: writing
- With a report （ ）， I have to cancel the trip A: written B: writing C: to write D: write
- The letter seemed () by a child. A: to have written B: to write C: to be writing D: to have been written
- Have you finished ______the paper? A: to write B: to have written C: writing D: having written