The pilot, whether ______ or design, made the plane do a sharp turn [ ]

Can you imagine how late I went to bed last night？It was nearly 1 a．m.______ I finished my article.

I hear Jane has gone to the Holy Island for her holiday.—Oh，how nice！Do you know when she ________？

His father has worked in this factory _____ he came here in 1980.

You are old enough to ________ your own living.[ ]