Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
A、open;tostandC
with the door open 是 with 的复合结构 ,open 为形容词 , 表状态 ; stood 与 came, entered为并列关系 , 在句中作谓语。
Heshookhandswiththevisitors________astoconveyhisapology.
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
Shewas________beunabletospeak
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.
NeitherEnglishnorChinese________difficulttolearn.
