by the advances in technology, manyfarmers have set up wind farms on their land

Nowadays, a lot of children have less time to play and communicate with their peer due to extra studies ________, it is difficult to develop their character and social skills

There _________ two wonderful basketball matches this weekend.

The lack of evidence and witness led to____.[ ]

A medical team was sent to Japan by air five hours ago.-So they ________ have arrived by now.The flight usually takes four hours or so.[ ]