请用所给动词的适当形式填空（共6小题；每小题1分, 满分6分）
小题1:So far, people ____________ (not find) the plane from Malaysia to Beijing.
小题2:When workers asked for better working conditions, the boss didn’t know how _____________
(deal) with the situation.
小题3:When I was a child, I once dreamed of ____________ (receive) a letter from the queen in the UK.
小题4:---I’m afraid you can’t park your car in front of our school. Look at the sign, please.
---Sorry, I ____________ (not see) it.
小题5:Simon, together with his classmates, ____________（search）the Internet in the classroom when the teacher went in.
小题6:Could you tell me when the theme park ____________ (open) in summer?
