We’ve seen many more days of blue skies recently　 —TrueBut back in 1998, ________ Beijing started its “Defending the Blue Sky”　　　　　program, the city only ________ about 100 days a year　

The number of traffic accidents that_______ in developing countries _______ increasing.

.He went there on foot and got very tired, but he _____ by bus. The fare was rather cheap.

I saw Ken in the meeting room, he ______ Joe for the school magazine.

The government tried its best to _____ the people’s needs, but the people were still not ______. In fact, what the government did was not______. [ ]