杀不(尽)头颅,流不尽鲜血”是革命先烈___的狱中绝笔。
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He ___ five different languages fluently.
A. speak
B. speaks
C. Spoke
D. speaking
Two months ago he ____from abroad.
A. return
B. returns
C. returned
D. was returning
要洗好头发,必须注意:水的选择、 ___________ 、 _____________ 。
Coal _____to produce electricity for agriculture and industry.
A. can use
B. can be used
C. is to use
D. is using