________ the 2020 Olympic Games will be held in Beijing is not known yet.
| A．Whenever | B．If | C．Whether | D．That |
The girl has a great interest in sport and _____ badminton classes twice a week over the last three years.
| A．took | B．is taking |
| C．takes | D．has been taking |
_____ basic first-aid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known |
| C．Knowing | D．Being known |
I’m calling about the apartment you ______ the other day. Could you tell me more about it?
| A．advertised | B．had advertised |
| C．are advertising | D．will advertise |
It was playing computer games _____ cost the boy plenty of time _______ he ought to have spent doing his lessons.
| A．what; that | B．that; when |
| C．which; that | D．that; that |
David is ______ animal fur, so he won’t visit anyone who has cats or dogs in the house.
| A．curious about | B．allergic to |
| C．satisfied with | D．fond of |