Allthe students were pleased to find the exam forthey found the answers

________ two months enough for the project tobe finished—I am afraid not The professor is ill and only afterhe recovers ______ go on with it

There______ a number of natural mysteries in the world that even make scientists ______.

Did Mike finish _________ his work— Yes, he finished it very quickly, and he did _________ work.

–Bill is warm-hearted and works hard.—________ his sister Betty.