I would appreciate it ________ you call back this afternoon for the doctor’s appointment.

Look! There are about _______ people in the shopping mall. They can hardly (几乎不) move forward.

I will visit you if I am available this weekend.

30．We think that it’s love, generosity and perseverance______make the worldit is today

It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a couple of months. [ ]