The first decade in the 21st century is the one ______ many significant advances are made in China.
—Excuse me. I want to buy some milk, but I can’t find a supermarket.—I know _______ nearby. Come on, I’ll show you.
--Was it at 11 o’clock ________ your father came back last night?--Yes, he is always coming back so late.
James has just arrived, but I didn’t know he ________ until yesterday.
--Congratulations! You’ve got a chance to go abroad!--_________.
--Can a plane fly ________ the Atlantic Ocean?--Yes, but it needs to go________ the clouds for hours.