A.请根据括号中的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。

小题1:He lived in a flat _______（在……的上面）the shop.

小题2:My parrot is clever enough to learn to ________（重复）the words I say.

小题3:The star sign says that I will have ________ (a good result) at school this month.

小题4:If you hate it, change it. If you can not change it, _______ (take something willingly) it.

小题5:It has been rainy for some days. So the ground is _______ and soft.

某建设单位与某施工单位订立了施工合同，建设单位负责电梯设备的采购。于是建设单位向电梯生产厂家发函要求购买两部电梯。电梯厂回函表示“其中一部可以按要求期限交付，另一部则需延期十日方能交付”。电梯厂的回函属于( )。

A．要约邀请

B．要约撤销

C．承诺

D．新要约