中国大学MOOC: The pen _____ quite smoothly.
举一反三
- The pen _____ quite smoothly. A: is written B: will be written C: is wrote D: writes
- The pen _____ quite smoothly. A: is written B: will be written C: is wrote D: writes
- This pen ______ for 10 years, but it still writes smoothly.
- 中国大学MOOC: They use computers to keep the traffic____（run）smoothly.
- 中国大学MOOC: The pen won’t write,it ______ out of ink.