________beautiful day it is! Let’s go and have a picnic in the park. —Good idea!

together to achieve our common purpose: ____ world that is safer, cleanerand healthier than ____ one we founded

he was investigating ways to improve thetelescope, Newton made ____ discovery which completely changed ________ man’sunderstanding of color

If you want to given a rise, you must be prepared to make a ____ contribution to the business.[ ]

Xiao Hong worked harder last year. _______ , she still didn’t get high grades.