根据句意写出括号内所给单词的适当形式。

1. She looks much _________ (health) than she used to be because she takes exercise every day.

2. Our English teacher has offered us some useful _________ (suggest). 

    I think they will help us a lot in our English study.

3. Please tell me the       __         (lady) telephone numbers, I want to interview them.  

4. You can see the _________ ( happy) on her face because she can't find her lovely dog.

一健康儿，能大笑，开始能发出"爸爸""妈妈"之复音，脊柱出现了第二个弯曲，对"再见"还不懂，其年龄可能是（）

A.3个月

B.5个月

C.7个月

D.10个月

E.12个月