I took the wrong train _______. I didn’t even know it until half an hour later .
| A．by mistakes | B．by mistake |
| C．with mistake | D．with mistakes |
【2014江苏南京】______ Lin Fang has to work late, she always wears a smile on her face.
| A．Because | B．If | C．Until | D．Though |
【2014浙江杭州】In summer milk will quickly go bad it is put into a fridge.
| A．though | B．unless | C．because | D．once |
【2014四川成都】___________I am in trouble, my classmates will help me out.
| A．Before | B．Whenever | C．Although | D．but |
【2014湖南益阳】—May I go to the movies with you?
—I’m afraid not ______ you have a ticket. Because I have only one.
| A．if | B．unless | C．though | D．if not |
【2014山东菏泽】---When will you return the book to me?
---I’ll give it to you _____ I finish it.
| A．once | B．until |
| C．as soon as | D．unless |