The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can ___ all foods are secure to us, but we are sure that the situation is turning for the better.
One of the students hasn’t prepared _____ lessons very well.
. His attitude to us is _____ of a comrade.
. He was ill. _____ is why he didn’t attend the meeting.
. —Shall I give you a ride as you live so far away? —Thank you. _______.
If I _______ you, I would go with him to the party.