1、单选题：
He was an ________ by profession.
选项：
A:electronic
B:electron
C:electrician
D:electricity
答案: 【electrician】

2、单选题：
What is the slow injection of a substance into a vein（静脉） or tissue?
选项：
A:transfusion
B:fusion
C:affusion
D:infusion
答案: 【infusion】

3、单选题：
______ is my favorite subject.
选项：
A:Biological
B:Biologist
C:Physical
D:Biology
答案: 【Biology】

4、单选题：
After the accident I spent 6 months on _________.
选项：
A:hospital
B:care
C:crutches
D:cure
答案: 【crutches】

5、单选题：
What is an instrument that doctor uses to listen to sb's heart and breathing?
选项：
A:gastroscope
B:bronchoscope
C:cystoscope
D:stethoscope
答案: 【stethoscope】