问题补充：
I am afraid I am not fit that job,for it is one much patience,which I lack.
A. calling up
B. calling off
C. calling for
D. calling in
答案：
A. calling up
B. calling off
(答案→)C. calling for
D. calling in
解析：本题考查动词短语。call up打电话给；call off取消；call for需要；call in 叫……进来，邀请召来；根据句意这项工作需要耐心。
