(2014·兰州高三质检)Our country is developing at an amazing speed，which is________makes me feel so proud

They put their books____to make the library clean and tidy.

Positive thinking puts power in our mind to act instead of staying stuck considering the circumstance or the mistake ______.

.I soon found that the work I was doing had already been done by someone else – ________, I was wasting my time

Help _______ to some fruits, boys and girls.