The young boy has come to himself in hospital now. But he ___ unconscious for three days.

—Why do you look so puzzled?—Oh，I ________ over a most difficult maths problem.

It is recommended that the project ________ until all the preparations have been made.

 ---- You shouldn’t have gone there alone last night.---- But I ______, because Xiao Wang went there, too.

She won the first prize；though none of us   it.