Without the friction (摩擦力) between feet and the ground, people would ______ be able to walk.

---Thank you for your timely help.
--- My pleasure. It is hardly      talking about.

— It’s my treat today. Is there anything particular you would like to have?
—______ you choose is fine with me.

--- I need to advertise for a roommate for next term.
--- _______？Mary is interested.

There’s no way of knowing why one man makes an important discovery ___ another man, also intelligent, fails.

(2013·高考江西卷)Mother always complains that children________their shoes very quickly.

(2013·高考安徽卷)It’s much easier to make friends ________ you have similar interests.

(2013·高考重庆卷)________we have enough evidence，we can’t win the case.

Thanks to the Party’s opening and reform policy, people in China are _____ than they were thirty years ago .