平静时胸式呼吸以哪种肌的活动为主()

A．膈肌

B．腹肌

C．肋间内肌

D．肋间外肌

E．胸大肌

We had wanted to finish ourtask by noon, but it didn't quite _____   as planned.     [ ]

A. find out    

B. give out    

C. hand out  

D. work out