根据下列句子及所给汉语注释或通过上下文，在答题卡标有题号的横线上，写出空缺处各单词的正确形式。每空只写一词。

38．Everyone should____________（行动）now to separate rubbish into different groups.

39．Mr. Wu said he had _____________（很少）seen a child with so much talent.

40．He went_____________（野营) with us and taught us how to put up a tent.

41．He seems to have a ______________（第六）sense for knowing that his brother will win.

42．Miss Zhang ____________（订购）a dress online two weeks ago, but it hasn't arrived yet.

43．Amy and Annie will go on a natural history walk next ______________（星期日）.

44．Before you start writing a story, think about the __________（人物）and what they do.

45．- Tickets for today?

- Sorry, we've got __________ left, but we have a few for tomorrow.

46．- Have you ever been to the Summer Palace?

- Yes. I have visited it many times _____________ 2009.

47．- I hear your grandpa has got an eye problem. Is it serious?

- Yes. He can't see anything now. He has gone _______________.

I would have come sooner but I    that they were waiting.

A．haven’t known                       B．hadn’t known

C．don’t know                          D．didn’t know

—Your phone number again? I    quite catch it.

—It’s 9568442.

A．didn’t          B．couldn’t        C．don’t           D．can’t

—Nancy is not coming tonight.

—But she    !

A．promises         B．promised         C．will promise     D．had promised

Dear me! Just    at the time! I    no idea it was so late.

A．look, have                           B．looking, had

C．look, had                            D．looking, have