Mr. Green stood up in defence of the 16-year old boy,_________ that he was not the one ____________.
-----They used to be good friends, but now they are like strangers. ----- How _____ this ______?
This new-type machine____________ little room.
The cattle _______ grazing on the grass.
Such a problem is____difficult for a primary school student ___.
— What does the sign over there read? —“No person __________ smoke or carry a lighted cigarette,cigar or pipe in this area.”