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【題目】Armstrong joined the navy in 1949 and served _______ a pilot for three years.

【題目】Mary chatted with a friend of on WeChat for a long time last night.

【題目】With the ______ progress in high technology, 5G has come into our life. (迅速的)

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【題目】From this story we know that nobody can be successful _______ any efforts. (沒有)

【題目】There is no _______ that we will realize our dreams in the end. (疑問)

【題目】Never _______ your life with others'. Every dog has its day. (比較)

【題目】To our surprise, the missing dog came back home _______(獨(dú)自).

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