It was reported that China's first moon car “Yutu" landed on the moon successfully _______December 14, 2013.A.in B.on C.at
----Where does Simon come from? ---- Tokyo, the capital of ________.
----Shall we go out for a picnic tomorrow? ---- ____________.
I’m so excited. I can’t __________ visit the Summer Palace.
Some people are walking _______ the bridge and some boats are going _______ the bridge.
_______ beef do we need to buy?