When this new kind of virus broke out at first in Mexico, no one had the least idea that it would _______ so rapidly throughout the world.
Soon after getting off his horse, the man appeared at the second storey windows, __he could see nothing but trees.
Tom was very angry about ________ to Mary’s birthday party.
You can come here to ask me _____ if you have any questions.
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.
Tom will succeed _____ your property after your death,but I don’t think he is success.