What an unforgettable experience ！ I'll write it down __________ it is still fresh in my memory.
| A．since | B．while |
| C．after | D．until |
Tony was caught at the meeting, which annoyed his boss.
| A．chatting | B．chat | C．chatted | D．to chat |
He suddenly fell ill, ______ prevented him from attending his friend’s wedding.
| A．why | B．what | C．that | D．which |
In some countries, ____ is called "equality" does not really mean equal rights for all people.
| A．which | B．that | C．what | D．one |
--- Do you know him?
--- Yes, but I can’t remember ______I met him for the first time.
A. where B. whatC thatD. if
_______ the sports meet will be held depends on the weather.
| A．Whenever | B．If | C．Whether | D．That |