3． The apples are _______the tree， and the birds(鸟) are ______ the tree．

A．in ;on

B．on ;in

C．on ;on

D．in ;in

[单选题]If the quantity demanded of pears falls by 4% when the price of apples decr

[单选题]If the quantity demanded of pears falls by 4% when the price of apples decr

[单选题]3．—Did you practice__________． English this morning?—Yes，but I forgot __________ the classroom．A． speak，cleaningB． to speak，to cleanC． speaking，cleaningD． speaking，to clean

[单选题]3． —Don’t you know he left a note on your desk?—_______．I haven’t gone home for a long time．A． Yes，l doB． No，l don'tC． Yes，l don'tD． No，l do

[单选题]3． You don't believe it? Go and see________ ．A． for yourselfB． of yourselfC． on yourselfD． with yourself

[单选题]3．A．inB．onC．atD．of

[单选题]3．A．directorB．personC．companyD．computer

[单选题]3．A．thinB．fatC．illD．tired

[单选题]3． —Hello !—________A．I'm AliceB．Thank youC．FineD．Hello

[名词解释] 树（tree）