单项选择。 — What's John doing now? — He ____
题型:选择题
问题:
单项选择。
— What's John doing now?
— He ______ a letter. [ ]
A.is writing
B.are writing
C.is writening
D.be writing
单项选择。
— What's John doing now?
— He ______ a letter. [ ]
A.is writing
B.are writing
C.is writening
D.be writing