______ should you give up learning English.
___ we have overlooked, however, is that there is no one answer to this question.
—What a shame!—Yes, I ____ his not doing it, but in vain.
Maybe you could be an inventor—maybe even good enough to _____ the next iPhone or the new medicine for cancer.
The child walked quietly to the bird._____ into the forest before he was about to catch it.
—Could you introduce me a high quality car?—My pleasure._____ well even on wet roads, this kind of car is especially popular.