She had almost failed the exam, but her sister, ________had done very well.[ ]

The two strangers have been talking in thepark for a long time as though they ______old friends.

_________ is a pity that such a great athlete _________retire so early.

Look at the problem! it’s very difficult, I have worked it out.— Good job.

The short-answer test is a kind of____between the composition and selection types.