49.Tom, go back to your own seat, you don’t  _______________this group.

48.---She works much harder this term, so she is in the top ten in class this time.

---To be hard-working _____________ success.

47.The news says the bad milk powder(奶粉)has caused the death of more than 10 babies _________.

46.---I heard she lost the game.

---___________, she did well. I really couldn’t understand why the result was that.

45.---What if we _________ our plan ?

---I guess everything would be different.

44.---What do you think of his behavior this time?

---___________, I felt sorry about what he did.

43.---How long do you plan to _________?

---About one week.

42.We’re easy to catch a cold ______________ the bad weather.

41. ---There are two solutions. But we haven’t decided which one we should choose yet.

---We must _____ right now, if not, things will be worse.