___ many times, she still didn't know how to do it.
| A．She was taught | B．Having taught | C．Having been taught | D．She has taught |
. --Can you smell something _________ in the house?
--Oh! I forgot to turn off the gas cooker!
| A．to burn | B．burning | C．having burnt | D．having been burnt |
--Dad, I want to go out for dinner with my friends tonight.
--Keep in mind _________ you have to be home by 9:00.
| A．that | B．where | C．what | D．when |
I _________ to the party with you tomorrow if I didn’t have to attend the meeting.
| A．went | B．had gone | C．would go | D．would have gone |
My brother’s bedroom is always a mess, and he can never find anything, _________ is very frustrating.
| A．where | B．whom | C．when | D．which |
I don’t understand why they don’t have the report. It _________ to them a week ago.
| A．is sent | B．was sent | C．will be sent | D．had been sent |