A broad smile spread_____ Jack’s face when he eventually gained a scholarship.
A．across B．through C．at D．in
China’s Beidou global satellite navigation system will have been completed by 2020, ____ of more than 30 satellites.
A．consisting B．consisted C．to consist D．consists
Such a fierce dog _____ that we had to wait outside before we could get into his yard.
A．has he had B．did he have C．he has D．he has had
An independent traveler would like to struggle with maps and signs ____ he finds the way．
A．since B．until C．before D．when
As soon as his teacher begins lecturing, he begins to doze off, not intentionally but _______.
A．personally B．randomly C．habitually D．unconditionally
The Chinese lunar New Year usually ______ two records: the world's most watched television gala show, and its busiest telecommunications network.
A．develops B．witnesses C．establishes D．launches
