My bicycle is nowhere to be found. Who ___ have been using it?
If law and order ______, neither the citizen nor his family is safe
At the bus stop ______ a soldier and two young people on their way to the village. 【选项】
Nothing but several glasses ________ bought by my father the day before yesterday.
The whole family _______ TV attentively.
What the children in the mountain village need ________ good books.