题目内容
Our teacher is busy ________ in his office though it is very late now．
- A.to write
- B.writes
- C.wrote
- D.writing
D
be busy的后面要接动词的-ing形式．
be busy的后面要接动词的-ing形式．
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Our teacher ____ in our school for 29 years and he ____ here when he was 23 years old.
| A．has taught has come | B．taught , comes |
| C．taught , came | D．has taught, came |
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