Almost       of the students in the class       glasses.

(2013·湖北武汉武昌区高三联考)One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.

Jack coughed day and night, so the doctor______him to take the medicine three times a day.

The price of goods kept ______. We had to cut the expenses in order to meet our daily needs.

—It’s difficult to tell this picture from that one.—Yes.The differences between the pictures are very________.