—When did you uncle arrive China? — He got to Guangzhou _______ the morning of April 16th.A. at; in B. in; in C. in; on
—How much shall I pay for the telephone call? —You _____. It's free.
—Why did you plant so many trees? — ______ the environment.
—Can we finish the work with ______ money and ______ people? —I'm afraid it's impossible.
—Computer is so useful. It can do almost everything. —Yes, but it ______ what to do.
That building is now a supermarket. It ______ a cinema.