按要求转换下列句式，每空一词。

1.I was shopping when the UFO arrived.(对划线部分提问)

_________ _________ you _________ when the UFO arrived?

2.My Math teacher said,"You are hard-working."(改为间接引语)

My Math teacher said _________ _________ hard-working.

3.You shouldn't speak loudly in the dining room.(改为祈使句)

_________ _________ loudly in the dining room.

4.They got home after ten o'clock last night.(改为同义句)

They _________ get home _________ ten o'clock last night.

5.The alien was buying a souvenir.The girl called the police.(改为复合句)

_________ the alien was buying a souvenir,the girl called the police.

对于排桩和地下连续墙的嵌固深度计算、下述不正确的是（）。

A.悬壁式结构可按抗倾覆稳定性验算其嵌固深度 

B.应按等值梁法验算单层支护结构的支点力及嵌固深度 

C.宜按静力平衡法计算多层支点排桩及地下连续墙的嵌固深度 

D.单支点支护结构嵌固深度设计值不宜小于基坑深度的0.3倍