问题补充:
Homework , I turned on the computer and tried to do some online shopping.
A. finishing
B. finished
C. to finish
D. finishes
答案:
A. finishing
(答案→)B. finished
C. to finish
D. finishes
解析:句意:作业完成了,我打开电脑想在网上购物。这里两句话之间没有连词,说明前面的不是句子,而是独立主格结构做状语,由“逻辑主语+非谓语”构成,因为Homework和finish是被动和完成的关系,用过去分词,选B。