The old people ______lonely at all since we began to visit them once a week.

Is your father a doctor in No.2 Hospital?—No, he ___________ a farmer and now he is a driver.

Recognized as ________ world cultural heritage by the United Nations in 2002, paper cutting is ________ practice which originated in ancient China.

Why _____ go to the zoo with us? [ ]

Can we find before an earthquake?—-Yes. Some animals will run wildly and some plants will come out in the wrong season.