______ when we passed by its nest.
A. Up into the blue sky did the bird fly B. Up into the blue sky flew the bird
C. Up into the blue sky the bird flew D. Flew up into the blue sky the bird
“Sorry” is the hardest word to say sometimes. _______ you know you’ve done something wrong, or something inappropriate, it takes courage to say sorry.
A. Only if B. Even if C. If only D. As if
______ for the breakdown of the school computer network, Alice was in low spirits.
A. Blaming B. Blamed C. To blame D. To be blamed
With more and more forests disappearing, today the public is much concerned about the way _________.
A. nature is being ruined B. which nature is ruined
C. on which to ruin nature D. of nature to be ruined
Without the friction (摩擦力) between feet and the ground, people would ______ be able to walk.
A. in no time B. by all means C. on any account D. in no way
Don’t take his remarks too seriously. He was so sad that I don’t think he really _________ what he was saying.
A. knew B. knows C. was knowing D. had known
