Dark clouds _______ the sunlight. It seemed as if it was going to rain.

 ---This is the seat for the disabled.--- Oh, sorry. I ____________ that.

Although our former neighbor       here for years, we seldom met with each other．

 Vincent van Gogh’s paintings were at last _____ as works of genius.

 Though ________ in San Francisco, Dave Mitchell had always preferred to record the plain facts of small-town life.