The world is changing with every minute， and China___________ with every minute，too．（ ）
A．is changingB．had changed
C．changed
room looks very clean．（ ）
A．Bob and Dave'sB．Bob's and Dave's
C．Bob's and Dave
﹣ dictionary is this？It's very nice．
﹣I think it is Mary's．（ ）
A．WhoB．WhoseC．Whom
They often have three meals day． They have dinner at 6：30 pm every day．（ ）
A．a；aB．a；theC．a；不填
All the classmates enjoyed the cake _________I made at the party． It was really delicious（ ）
A．thatB．whoC．what
Lucy， there _________too many things on the desk． What a mess!
Sorry， Mum． I'll put them away．（ ）
A．haveB．isC．are