选择题
My younger sister couldn't help_______when she found her doll missing.
A、
but to cry
B、
but crying
C、
to cry
D、
crying
【正确答案】
D
【答案解析】
固定句型can't help doing sth."本题考察非谓语中固定句型can't help doing sth."情不自禁做某事"，因此选D。
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