用括号内所给动词的正确时态填空。

1. Would you please _________ (help) me with my English?

2. We will go to the park if it _________ (not rain) tomorrow.

3. Lucy kept on _________ (ask) the teacher strange questions.

4. We usually have a wonderful time _________ (chat) with each other.

5. There _________ (be) a drama show for the elderly tomorrow, isn't there?

6. We Chinese spend as much time as we can _________ (do) homework.

7. Would you mind my _________ (open) the window?

8. He ________ (put) on his coat and _________ (run) out just now.

9. Children don't know how __________ (be) safe in the fire.

10. When will you finish __________ (wash) these clothes?

下壁心肌梗死出现特征性心电图改变的导联是（）。

A.V₁、V₂、V₃

B.V₇、V₈、V₉

C.V₃、V₄、V₅

D.Ⅱ、Ⅲ、aVF

E.Ⅰ、aVL、V₄₅、V₆