Young people have a hard time _____ when they cannot communicate well with their parents.
Agrow up
Bgrowing up正確答案
Cto be grown up
Dto be growing up
答案與詳解
為什麼答案是 B
have a hard time Ving 是固定用法，表「做某事有困難」。原句完整為 have a hard time (in) growing up，介係詞 in 常省略。
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