(届陕西省五校联盟高三第二次模拟考试英语试卷)Be careful when you deal with this chemical, as it will explode when ______ to sunlight.
Late in the afternoon, they arrived at ______ small village ______ north of the West Hill.
Mr. Smith, _____ of the ______ speech, started to read a novel.
---The light in the office is still on. --- Oh, I forgot _______.
. Rather than _______ on a crowded bus, I always prefer _____ an electric bicycle.
Tony, my best friend, has done _______ he can to help me out of trouble.