21．As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work．
A．不填；不填 B．不填; a
C．the ; a D．the; the
22．Tom's mother kept telling him that he should work harder, but ______didn't help．
A．he B．which C．it D．one
23．Put yourself in situations where you're forced to communicate in English, ______ you'll see more progress over time．
A．until B．or C．but D．and
24．The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role．
A．is taking B．was taking C．took D．had taken
25．What's your opinion of Mr．Li's request that we ______ spend half an hour reading English aloud every morning?
A．would B．should C．must D．could
牛津7A Unit 3 period 1 Comic Strip and Welcome to the Unit
七年级语法 音标学习
牛津7A Unit 1词汇复习
牛津7A Unit 3 period 7-10 Integrated Skills&Checkout
牛津7A Unit 1 This is me!
牛津7A UNIT 1 period 7 Integrated skills
牛津7A Unit 1 period 3 Reading (2)
新目标七年级上Unit 10 Can you play the guitar
牛津7A Unit 1 period 5 Grammar(1)
牛津7A Unit 1 period 4 Vocabulary