Before the first non-stop flight made in l949, it ______ necessary for all planes to land for refueling.
A few spots of turbocharger can be caused by() ①crash stop of engine ② rapid increased of engine speed
I decided to stop and have lunch, _____ I was feeling quite hungry.
Will you please stop saying that? Do you think I’ll be ______ to believe what you say?
Under which circumstances will a thread stop?()
How should you signal the crane operator to stop in an emergency?()
When the lights turn red, the traffic()stop.
I decided to stop and have lunch, _____ I was feeling quite hungry.
Stop()the derrick at once, the gooseneck is bent.
After stopping for a few minutes, the bus moved()to its next stop.