It’s very convenient ______ us to buy train tickets now because we can buy them either from the station or on the Internet.

--- Is there any flowers _______ the tree.
--- No. But there are many birds _________ it.

--- Who went to the beach yesterday?
--- All my family went there ____ my son. He should study for the test at school.

My teacher is strict          us.

–Are you good          English?
--No, I want you to help me        it.

They arrived       Paris      a winter evening.

My sister goes to the concert  ________ car every Sunday.

They arrived _______ Beijing on the evening of May 24.
A. at               B. in  C. on

They didn’t continue to climb up the mountain __________ the bad weather.

The 31st Olympic Games will take place in Brazil ______ 2016.