用括号内所给单词的适当形式填空
【小题1】He left home in a hurry because he had some problems ________ (solve) in his office.
【小题2】I don’t like travelling by plane. I think it’s ________ (safe) to travel by train.
【小题3】________ (luck), modern medicine can help people with eye problems in some developed countries.
【小题4】They ________ (plan) a trip to Disneyland at this time yesterday.
【小题5】--- Excuse me, where is the ________ (lady) room?
--- It’s over there.