nd it difficult to read, ________ he had a problem with his eyesight.

Mr. Kong, who is in poor health, _____ such a hard life.

I __________ Beijing three times, I know there very well.

Not until they left school ________ how much their teachers loved them and helped them. [ ]

You seem in low spirits. Anything wrong—– I ______ in the important exam. I let my parentsdown.