⑴You need a swimming cap. ____
⑵First,you should wash yourself. ____
⑶Next,you should do warm-up exercises. ____
⑷Then, you can enjoy your swimming lessons. ____
⑸You need a swimsuit.____
A. B. C. D. E.
世界上的火山和地震，大多发生在（ ）
绿色开花植物在完成受精作用后，所形成的受精卵将发育成（ ）
B. 
C. 
E.
