This is eraser and that is pencil sharpener.
----Is that Tom speaking?----Sorry, he is out now. He _______ the cinema with his classmates.
----Mike wants to know if ________ a picnic tomorrow.---- Yes. But if it ________, we will visit the museum instead.
----What did you see on the large farm last Sunday?----Oh, I saw about three ________ hens and _________ of eggs.
----How many foreign workers are there in your company?----There are five, three _______ and two _______.
----What were you doing this time yesterday?----I ________ my homework at John’s house.