60. —What do you think of the news _____ that young man provided?
—It is a big lie. He did so just to be able to show up in TV.
A. what B. which C. whom D. when
61. The chemist, who once worked there as a farmer for five years, kept his promise _____ he would return to his home town after twenty years.
A. what B. that C. whether D. when
62. It is not certain _____ effect the medicine have on the disease.
A. how B. what C. which D. whose
63. It’s a pity _____ the plane will arrive is still unknown. It all depends on the weather.
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