We should ________ adjust ourselves to the development of our society.

Trees need water to grow; _____, friendship needs our heart and passion to develop.

As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil．

Recent studies have discovered that fathers uniquely contribute to the development of their children, _____ in low income families.

Traffic is bad, ______ in the city center during the rush hours.

Although the country has had political independence for over a century,   it needs the support of its neighbors.

Nowadays the roles of husband and wife are not as   defined as before, especially when both partners work and earn money for the family.

I shall certainly not tell him the news. ________, it will go to his ears sooner or later. 

The driver got out of the car_______it caught fire .

Everybody went to the opening ceremony of the film festival——_______ Francisco, who has no interest in anything but sports.

---I have seen so little of Mike______. Is he away on business?---Oh, no. He just leaves for his office and returns very ______.

The girl seldom, if _____, turned to her brother for protection.

Football is very important to me, but _____ is our friendship.

—Is there anything I can do for you?—There seems to have been a technical problem—______，that’s what they told me．

–You are Mr. Zhang, aren’t you? --______. 

 We have planted thousands of trees in recent years. This year _____ we’ve planted ten thousand trees.

"How dare you say that?" The teacher said ___ to Tom.

The weather was great and the people were friendly—_______ a perfect trip.

---How about your mid-term examination? ----I did badly, __________ I failed in it. 

The match was really fantastic, __      when Smith scored in the last minute.