If you ___ weighting the pros and cons and calculating gains and loses.

If you ___ weighting the pros and cons and calculating gains and loses.
What's the meaning of "pros and cons"
A.spend time
B.kill time
C.have a hard time
D.hope for

If I ___(know)I ___(tell)you. if you work hard, you will be ___ one day. 28.If you don't go climbing tomorrow,___. if you want ___ ,call me. A.something B.anyting 1.It's too late.But if you ___ ___ ___it,you may out with them. If you want to improve your writing skills,you need more ___. If you folow these steps, slowly, you will be able to ___ If you want a ticket for a round-trip,sir,you'll pay ___$80. 英语难题(急)what would you say if i ___ you the truth If i hadn't stood under the ladder to catch you when you fell ,you ___ now.