The task is too much for him so he can’t continue any longer. He must get some help.A. si

问题补充：

The task is too much for him, so he can’t continue any longer. He must get some help.

A. singly

B. simply

C. alone

D. lonely

答案：

A. singly

B. simply

(答案→)C. alone

D. lonely

解析：题意：这项任务对他来说太重了，他再也不能单独自己做了，他必须找个助手。singly各自的，一个一个地；simply简单的，仅仅，只不过；alone独立，单独；lonely孤独的，寂寞的。