Large quantities of information, as well as some timely help _____ since the organization was built .
Based on the agreement, all payments _____ be made by the end of the month.
—Do you know the headmaster well? —Not really, just a nodding ______.
---I wonder what makes you a good salesperson. ---I _______ as a waiter for three years, which contributes a lot to my today’s work. A. serve B. have served C served D. had served
A lot of the waste thrown away in the U.S. ______ being shipped overseas to China, India, and other developing countries.
“American will fulfill the commitments that we have made: cutting our emission in the _______ of 17 percent by 2020”, said Obama.