Only _______ English doesn't mean _______ the language.
A. to learn；to learn
B. learning；learning
C. learning about；learn
D. learning about；learning
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She returned home only to find the door open and something _______.
A. missed
B. to be missing
C. missing
D. to be missed
She decided to devote herself _______ the problem of old age.
A. to study
B. studying
C. to studying
D. study
填入动词的适当形式：Can you imagine yourself _______ in a lonely island? (stay)
She was praised for _______ the life of the child. (save)
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