obama is the first black A____ president

obama is the first black A____ president
lte's go shopping in the s_____.
介词填空
the mall is opten___6:00 to12:00.
they are waiting ____ the bus stop.
DaMing is talking ______Linda.
do you go swimming _____ saturday?
let,s talkk ____ the picture.
they are ____ great danger.
my mother___(water) the flower now.
it,s half past seven now.i___(read) English.
the,re cleaning the classroom.对划线部分进行提问（the classroom划线）
——— ——— they————?
who ___ my prents talking ___?a.are;/ b.is;/ c.are；to d.is;at
介词填空到：they are __ great danger，其余不是。