Lisa in the kitchen when you called her at 5 o’clock in the afternoon.

Let’s go climbing, shall we — You _______ be joking ! Don’t you know I’m afraid of high places

We considered him to be a true friend, ______did many others whom he had cheated

The theory wasn’t accepted by many people when it was first ____, but it proved to be true as time went by.

He was unable to make such progress, _______.