_______ in thought, he almost ran into the car in front of him.
A、LosingC
这里分词短语的意义应为“Ashewaslostinthought”，意为“由于陷入沉思”，这儿填入过去分词短语，表示一种状态，用作原因状语。
It _______ for two hours now
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
He shook hands with the visitors ________ as to convey his apology.
______ the new plan can be carried out will be discussed at the meeting tomorrow.
Poor speaker of English though he was at the time, he still managed to make himself ________.
