Could you tell me____ so well？
Without the teacher's help， it was impossible for me to get the prize．（ ）
A．how did you do itB．when you did it
C．why did you do itD．how you did it
She will fly to Haikou as soon as she _________________ the task.（ ）
| A． |
finish |
B． |
finishes |
C． |
finished |
The population of Suihua is much smaller than _________of Harbin.（ ）
| A． |
it |
B． |
one |
C． |
that |
He said that he _________to Beijing the next month.（ ）
| A． |
travel |
B． |
would travel |
| C． |
travels |
D． |
There is plenty of information about AI（人工智能）on the website，___________？（ ）
| A． |
isn't there |
B． |
isn't it |
| C． |
is there |
D． |
My aunt became a nurse in her _______and she still loves her job now.（ ）
| A． |
twenties |
B． |
twentieth |
C． |
twenty |