They plan to have a party _______ Saturday afternoon. A. on B. in C. at
---I met your boss in the street this morning. ---Ah? You _____ be joking. He flew to Europe yesterday!
--- When will our graduation ceremony be held? ---______ two weeks’ time, _______ 18th June.
There are over 58,000 rocky objects in_____ space,about 900 of which could fall down onto ______ earth.
---I heard quite a few bikes were thrown away at Liaocheng University. --- _________________. They should be made use of.
There are so many foggy days these years. We all wonder ______________________.