Using Dr Yuang’s hybrid rice, nowadaysfarmers are producing harvests ________ before.

The notice says _________ you are, you must show your tickets to enter the exhibition

You can’t see anything clearly through a telescope unless it ________ correctly to your sight.

Sixty percent of all Chinese are farmers and they are than people who live in the cities.

How long have you .here For two days. I ________ here the day before yesterday.