They _______Sally and Bob. Sally _______my cousin.
---Do you know ____________ the population of China is?---Yes, it has the __________ population in the world, about 1.3 billion.
---What do you think of your teachers? ---Sometimes they are too strict __________ us _________ our study.
--- It’s reported that some famous singers will give a performance in Yangzhou. ---Wow, ________.
---Excuse me, how can I find useful information on the Internet?--- ________ the information you need, type in the keywords and then lots of websites will appear.
---How does your English teacher help you to practice English?--- By encouraging us to __________ some dialogues with our partner in class.