—Hi,let's go skating.—Sorry,I'm busy right now. I ________ (fill)in an application form for a new job.
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I found the lecture hard to follow because it ________ (start) when I arrived.
Unless some extra money ________(find),the theatre will close.
The reports went missing in 2012 and nobody ________(see) them since.
—Haven't seen you for ages! Where have you been?—I went to Ningxia and________(stay) there for one year,teaching as a volunteer.