Some of the cats are singing and some of ______ are dancing.
they
cats
them
us
Some of my ________ (朋友）are doing the high jump.
fiend
friends
firend
friend
It ________ (look) fun.
looking
is look
look
looks
It ________ interesting.
looks
looking
is look
look
(C-E) 你的弟弟正在做什么？
What your brother doing?
What is your brother do?
What are your brother doing?
What is your brother doing?
(C-E) 他们正在游泳池旁边溜冰。
They are skating next to the swimming pool.
(->negative) They are doing kung fu.
They aren't doing kung fu.
（C-E) 有些男孩子正在树下面下棋。
Some boys playing chess under tree.
Some boys are playing chess under the tree.
Some boys are playing under the tree.
Some boys play chess under the tree.
(C-E) 这些苹果当中的一些是红色的。
Some apples are red.
Some of these apples are red.
These apples are red.
Some of the apple is red.
(C-E) 兔子们正在做什么？
What do the rabbits do?
What are the rabbits doing?
What are the rabbits do?
What do they rabbit doing?
(C-E) 我想和他们一起打网球。(Hint: with)
I want to play tennis with them.
（C-E) 孩子们正在操场上做什么？
What are the children doing in the playground?
(C-E）你想跟孩子们一起在操场上打功夫吗？
Do you want to do kung fu with the children in the playground?
______ the woman ________ (do) the long jump? (这个女人正在跳远吗？）
Do, do
Is, doing
Are, doing
Does, do
（C-E) 我想Bob正在和他的弟弟在他的睡房里下棋。(Hint: with)
I think Bob is playing chess with his brother in his bedroom.
(C-E) 女孩子们正在打篮球。
The girls playing basketball.
The girl is playing basketball.
The girls are playing basketball.
The girls are play basketball.
Some ____ the ducks are swimming.
for
to
of
with
______ Mickey and Minnie _______ (skate) on the ice? (米奇和米妮正在冰上滑冰吗？）
Is, skating
Are, skateing
Are, skating
Are, skate
I want ________ (play) football.
play
playing
to playing
to play
(C-E) 那些建筑工人正在建造一所大房子。
Those builders are building a big house.
Those builders building a big house.
These builders are build a big house.
These builders are building big house.