About _______ of the workers in the factory were born in ______.

As is known to us all, travelling all overthe world is out of question withoutpassport.

小明跑步健身，坚持一段时间后想放弃，以下句子最适合用来激励他的一项是（　　）

She made a conscious attempt to look ______ though she felt tired out.

Mum, can I go out to play for a while–No, you can’t, ________ you finish your homework.