7a.
A:what is this?
B:it is a pen;
A:what is this?
B:it is an envelope;
A: what is this?
B:it is a book;
A:what is this?
B:it is a chair;
A: what is this?
B: it is a dictionary;
A: what is this?
B: it is an eraser;
A:what is this?
B: it is an apple;
A: what is this?
B: it is a desk.
A:what is that?
B: that is a blackboard;
that is an umbrella
that is a pen;
that is a table;
that is an exercise book
that is an atlas;
that is a computer;
that is a bag.
7b. this pen is red. this envelope is rectangular. this book is big. this chair is old. this dictionary is useful. this eraser is tiny. this apple is delicious. this desk is useful.
that blackboard is clean. that umbrella is huge. that pen is grey. that table is square. that exercise book is difficult.apoi, that atlas is interesting. that computer is new. that schoolbag is heavy.
