—Who sings best in your class? —Mary _____.
A broad smile spread_____ Jack’s face when he eventually gained a scholarship.
China’s Beidou global satellite navigation system will have been completed by 2020, ____ of more than 30 satellites.
Such a fierce dog _____ that we had to wait outside before we could get into his yard.
An independent traveler would like to struggle with maps and signs ____ he finds the way.
As soon as his teacher begins lecturing, he begins to doze off, not intentionally but _______.