The boy’s dream was to have his own laboratory ________ to try out some of his own ideas.
Earth is believed ______ by an object the size of Mars at some point in the distant past before itssurface cooled.
our earth, or else it will be no longer fit for us to live on.
With temperature ______ so rapidly, we could not go with the experiment.
They've won their last three matches, I find a bit surprising.
It's 5 days we came here. Why shouldn't we start?