__________ by the heavy rain, the area was flooded seriously.
Maths ________ not easy to learn.
This isn’t ______ pencil case. I left ______ at home.
The English novel is quite easy for you. There are ______ new words in it.
------ Can I come this evening or tomorrow morning? ------ ______ OK. I’m free today and tomorrow.
The population of China is much large than ______ this B.those C.it D.that