— Are you going to travel during this summer vacation?— No I’ll have to do some part-time

问题补充：

— Are you going to travel during this summer vacation?

— No, I’ll have to do some part-time job for my study. , there’s a disease spreading.

A. Also

B. Therefore

C. However

D. Unluckily

答案：

(答案→)A. Also

B. Therefore

C. However

D. Unluckily

解析：考查副词辨析。A而且；也（用于肯定句中）；B因此；C然而；D不幸地；句意：—在今年暑假里你要去旅游吗？—不；为了学习的费用我要去做兼职工作。而且现在还有疾病在传播。上下文之间存在着递进的关系，故A正确。