The two friends _____ on the Internet for three hours, and they would go on till the next morning. 
#63829
A
had been chatting
B
had chatted
C
were chatting
D
has been chatting
推荐题目
 Some kinds of animals can _______ the colour of their surroundings.
#63818
A
take on
B
dress up
C
put on
D
get into
 By the time Jack returned home from England,his son ________ from college.(2011·辽宁)
#63809
A
graduated
B
has graduated
C
had been graduating
D
had graduated
Their house _____ in the big fire, so they decided to build another one.
#63799
A
has been destroyed.
B
had destroyed
C
had been destroyed
D
destroyed