The bell ______ the end of the period rang, ______ our heated discussion.
#91760
A
indicating; interrupting
B
indicated; interrupting
C
indicating; interrupted
D
indicated; interrupted
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—Shall we go swimming?—OK.I’ll go and get       .
#97787
A
changed
B
to change
C
to be changed
D
changing
Our teacher insisted that the key words worth paying attention _______ before class.
#95656
A
be underlined 
B
being underlined
C
to be underlined 
D
to being underlined