trange new means of transport have beendeveloped in our century, the strangest of _______ being perhaps thehovercraft.

When he came back, his _________ look on his face, he failed in the interview.

It’s true that the old road is less direct and a bit longer. We won’t take the new one, ________, because we don’t feel as safe on it.

The boss looked very worried and demandedthat the work________before we went home.

The work is so difficult to deal with that I think a man of genius could accomplish the task.