I found _______ difficult to finish all the work in such a short time.
— Kitty, there’s ________ cooking oil left in the kitchen. Would you please go to the supermarket and get ________?— OK, Mum.
Chinese is becoming more and more popular. It ________ in many schools in foreign countries.
— You speak French so well. How long have you learned it? — ________ I was fifteen.
The presentation of the Film Festival will be covered live tonight. It’s worth ________.
It’s so silly ________ people to buy and store so much salt. It’s necessary ________ them to learn more about salt.