请认真阅读下面对话，并根据各题所给首字母的提示，在方框的右栏标有题号的横线上， 写出一个英语单词的完整. 正确的形式，使对话通顺。

Mary: I heard you had just flown in yesterday, hadn’t you?

John: Yes, but that was a t_____ experience. I wouldn’t think that I will fly again.

Mary: What made you say so?

John: Well, e____ went on OK in the f______ three hours after the plane took off. The evening meal had been served already and a film was showing. Most of the passengers were watching it.

Mary: But where were you after three hours’ flight?

John: Well, it’s a nine-hour flight from San Francisco to Shanghai, so we were righta______ the Pacific Ocean. I could almost see a jet of black smokep______ out. In the meantime the plane was bumping along, whichs______ my heart jumping in my mouth.

Mary: What happened next then?

John: Just at the mercy of wind and weather, I had been sitting on pins andn______ for almost an hourw_______ I heard the hostess through the public communication system announcing that in three quarters’ time we’d be landing at San Francisco again. And the plane was returning s______ out of technical reasons. Silence followed. Yet everyone on b______ was praying for him. When the plane at last landed safely, there broke out a loud cheer for the pilot.

John shut everybody out of the kitchen ____ he could prepare his grand surprise for the party.

A. which           B. when            C. so that          D. for

John shut everybody out of the kitchen _______ he could prepare his grand surprise for the party.

A. which B. when  C. so that      D. as if

20. John shut everybody out of the kitchen _______ he could prepare his grand surprise for the party.

A. which  B. when   C. so that  D. as if

John shut everybody out of the kitchen _______ he could prepare his grand surprise for the party.

A. which B. when

C. so that D. as if