Such the case, I couldn’t help but him.
A. being; support
B. is; to support
C. has been; supporting
D. be; supported
网友回答
(答案→)A. being; support
B. is; to support
C. has been; supporting
D. be; supported
解析：考察句子结构问题。句意：既然如此，我只能支持他。注意句中是逗号，说明只是一个句子，而后半句有谓语，前面只能用分词构成独立主格结构，否则就一个句子中存在两个谓语，这是错误的。couldn’t but to do 是固定搭配，意思是除了干某事别无选择。