阅读短文并回答下列问题。

                                 The Seasons

    In spring, the birds sing. The flowers(花)grow(生长).We fly kites. In summer, it's ery hot. The sun

shines(照耀). We go swimming. We wear(戴)sunglasses(太阳镜). In autumn, the  leaves(树叶)fall

(落下). It's cool and windy. We play football. In winter, it's very old. We watch TV and play table tennis.

1. What do you often(经常地)do in summer?

     _____________________________

2. Do the birds like spring?

     _____________________________

3. Is it windy in autumn?

    _____________________________

在S曲线比较法中，当实际进展点落在计划S曲线右侧表示（）。

A.实际进度计算不准确

B.实际进度与计划进度相同

C.实际进度比计划进度落后

D.实际进度比计划进度超前