Where are you,Tom?Here in the sittingroom,________to Professor Smith.A.to write B.writing C.is writing D.to be writing请翻译 并说明理由.

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Where are you,Tom?Here in the sittingroom,________to Professor Smith.A.to write B.writing C.is writing D.to be writing请翻译 并说明理由.

Where are you,Tom?Here in the sittingroom,________to Professor Smith.A.to write B.writing C.is writing D.to be writing请翻译 并说明理由.
Where are you,Tom?
Here in the sittingroom,________to Professor Smith.
A.to write B.writing C.is writing D.to be writing
请翻译 并说明理由.

Where are you,Tom?Here in the sittingroom,________to Professor Smith.A.to write B.writing C.is writing D.to be writing请翻译 并说明理由.
B 动名词短语做状语,表示当时所处的状态.

B.writing
汤姆,你在哪儿?
在卧室,给史密斯教授写信呢。

B writing 表示动作的伴随

猜的
B

B