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They looked at each other --------------------- they had seen a ghost.

• if as

• though as

• if though

• as if

He spoke about the incident as though -------------------- it firsthand.

• he is witnessing

• they had witnessed

• he had witnessed

• he has witnessed

After the interruption, the speaker went on talking as if nothing ................(happen).

Mark looks very tired. He looks as if he ........................ some rest.

• will need

• needs

• needed

• had needed

I don't think Paul was joking. He looked as if ...........................