It seems that living green is __________ easy and affordable. A small step makes a big difference.
32.Hesitating what to do,________.
31.The man stopped his bicycle beside the car______it had a broken chain.
30.Mike has an active mind;he can retell a story_________anybody else in the classroom.
29.The attackers were arrested and didn’t know where they ______.
28.___________a time in the 1960s when young people liked wearing army uniforms.