Our plans must hang fire for a time. The underlined part means______.A．be delayedB．be dest

Planning our vocation we must take the frequent______of the weather into consideration.A．t

Being easily set on fire, alcohol must be kept away from the flame.A、酒精容易着火，必须放

【C5】A．were hangedB．would hangC．were hungD．must be hanged

We must keep away from some _____, for they will do harm to our health.A.chemistryB.

There is no margin for error in our plan.

There is no 【margin 】for error in our plan.A.room