用所给单词的适当形式填空

1. More and more young people are trying to do something  _________( serve) the old.

2. The doctor did what he could_________ (save) the  dying man.

3. The teacher asked Ben___________(answer)a difficult question in class.

4. Don't forget___________ (see) my parents when you are in  Shanghai.

主要通过抑制钙调磷酸酶活性，从而抑制TH细胞的活化及相关基因表达的药物是

A．他克莫司

B．肾上腺皮质激素

C．硫唑嘌呤

D．霉酚酸酯

E．环孢素