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.
A. acknowledge B. guarantee C. identity D. clarify
Going on a trip into ______ space must be quite ______ exciting experience.
A. / ; the B. / ; an C. the; an D. the; a
—I am going to travel to Jamaica. Would you consider telling me about your experiences there?
—_ _. Let's discuss it over dinner.
A. That's all right B. Go ahead C. By all means D. It just depends
I _____ sooner but I didn’t know that they were waiting for me .
A. had come B. was coming C. would come D. would have come
Experiments of this kind ___in both the U．S and Europe well before the Second World War
A．had conducted B． have conducted
C．have been conducted D. had been conducted
The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.
A. average B. ordinary C. common D. usual
