I think they’ve got to the very point _______ a change is needed, or they will fail.
The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
—Would you like me to help you with the maths problem?—___________ It’s a most difficult one.
We were going out for a walk ________ it began to rain.
I want to buy that kind of cloth because I _____ the cloth _____ well.
Tomato, which used to be called “love-apple”, is not ____but ______.