21.
(2019·盘锦)
A landmark(里程碑) in the history of science was made by a photo _______ was taken on April 10th about the black hole in a faraway galaxy(星系).
22.
(2019·昆明)
In order to take a pleasant trip to Kunming, Dave emailed me to ask________.
A . what was Kunming most famous forB . what Kunming was most famous forC . whether is summer a good time to comeD . whether summer is a good time to come
A . where is the station's waiting roomB . where was the station's waiting roomC . where the station's waiting room isD . where the station's waiting room was
