Each student is to give a short___ (speak)to the rest of the class at the end of the semester.
speech
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电话是在1876年发明的。翻译
Mary accepted Davids ___(invite)to join him for lunch.
If I ______ in your place ， I wouldn ‘t trouble him.
People today are highly concerned about the quality of the air they___(breath).
I doubt _______ they can complete the bridge ahead of time.
