You think you are the only person feeling ___________(embarrass) when making mistakes.
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Tony Green has worked very hard to make his dream a(n) ________(real).
Nothing can ________ (gain) without risk.
It is not that _______ (help) in learning English to study grammar only.
移位寄存器中的一级是由下面的哪一项组成？（ ）
A. 计数器
B. 译码器
C. 触发器
D. 加法器
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