1.根据句意及汉语提示写出适当的单词.2.用恰当的句子补全下面的对话.

1.根据句意及汉语提示写出适当的单词.2.用恰当的句子补全下面的对话.
①This cake is ____（为）you.You can eat it .
②-Where is Mary?
-She is in the ____（实验室）.
③____（科学课）is my sister's favourite.
④There are two white____（建筑物）in my school.
2.A:Goodmorning,Li Xiang.
B:Goodmorning,Ma Jun.
A:(1)_______________________
B:There are twenty classes in my school.
A:(3)_______________________
B:Yes,there is a big library.
A:And is there a sports hall?
B:(4)_______________________We have PE in it .
A:(5)_______________________
B:It is on the left of the school gate.