Sales of CDs have greatly increased since the early 1990s, when people_____to enjoy the advantages of this new technology.
----How about your trip to Hainan? ----It couldn’t have been _____. Sometimes I went swimming in the sea; sometimes I lay on the sand.
----I didn’t do well in this English examination. How about you? ----I did _____ you.
----I wonder why Mary is so unfriendly to us. ----She is _____ than unfriendly, I’m afraid.
The library needs ______,but it’ll have to wait until Sunday.