How long do you think it is _______ he took up the job?—Half a year at least[ ]

We _____ obey the new traffic rules to improve our road safety.

________ is it from your home to school

I can’t play the violin. What about you, Rick—I can’t, ________.

Why didn’t you try your best to get on the subway (地铁)—I tried to, but it started moving _______ I could get on it.