1.it is the _twentieth__[twenty/twentieth] of december.2.let's go to the supermarket and __buy_[by/buy] something to eat.3.look!lisa is __talking_[talking/talk] something to eat.4.please put _them__[they/them]on the table.5.what _is__[is/are]your mother doing?6.where were you yesterday?i _was__ (was/were] at school....
