China's Beidou Navigation Satellite System has started providing global services, ________ to become complete around 2020.
A. being scheduled B. scheduled C. to schedule D. scheduling
Most people quit ________ any results appear; they give up too soon and a quitter never wins.
A. while B. until C. since D. before
Governments around the world increasingly ________ artificial intelligence to help promote economic growth.
A. put out B. roll out C. make out D. reach out
-How can I get in touch with the travel agency, Robin?
-Just surf the Internet and then call one ________ the telephone number is provided.
A. with which B. in which C. of which D. by which
The waitress at the restaurant was usually very considerate, but on this occasion she seemed to ________ the diners.
A. ignore B. identify C. applaud D. satisfy
Historic sites impress writers with their amazing beauty, which are a great source of ________.
A. inspiration B. composition C. occupation D. combination
