通读下面短文，掌握其大意，然后在每小题所给的四个选项中，选出一个最佳答案。

    It's a fine Saturday morning. There are many people in the park. Many of 1  are young and some are old.

    Some children are 2  games over there. Two boys are playing  3 their toy bats. There is a lake in the park. The water is 4  .  There are some 5  on the lake.  6  the lake a young man is reading. There is a house near the lake. Beside 7 house two men are working. Look at that big tree! There are some birds 8  it. Under it are some men. Four of them are playing cards. One of them is looking at two cats. The cats are 9 up the tree. What do they 10  to do? They want to catch the birds.

(____)1. A. school         B. class         C. pencil

(____)2. A. lunch          B. breakfast     C. playground

(____)3. A. afternoon      B. book          C. morning

(____)4. A. home           B. school        C. have

(____)5. A. night          B. morning       C .evening

被子植物的受精过程依次是（　　）

①精子与卵细胞、中央细胞结合；②花粉管进入子房；③花粉管进入胚珠；

④花粉管顶端破裂，释放出两个精子；⑤花粉粒萌发出花粉管．