根据对话内容，从方框中选出能填入空白处的最佳选项，补全对话。
A：Hello，Mike! What’s the time?
B：
A：Where’s Bob? I can’t find him.
B：I don’t think he can come.
A：
B：He has to look after his sister.
A：
B：She doesn’t feel well.
A： Did she go to see the doctor?
B：Yes.
A：
B：The doctor said nothing serious，but she has to rest.
根据首字母提示填空
These policemen wear helmets to p________themselves．
用所给词的适当形式填空
The young man dived to a________（deep）of 40 feet．
根据汉语提示完成句子
When we are in trouble，we should face the challenges________worrying about our problems．（代替）
根据首字母和汉语提示写出所缺的单词
You are b________（勇敢的）enough to accept such a difficult job．
根据汉语意思完成句子
我昨天早上8点钟才醒。
I________until 8 o’clock yesterday morning．