---I was riding along the street and all of a sudden, a car cut in and knocked me down. --- You can never be ______ careful in the street.
If there were no examinations, we should have_____at school.
She is_____new comer to____chemistry but she has already made some important discoveries.
—— Where’s Jack? —— I think he’s still in___bed, but he might just be in___bathroom.
Which is_____country, Canada or Australia?
Alexander Graham Bell invented_____telephone in1876.