In his speech the headmaster __________ to the great help the school received from the district government.
#82206
A
expressed
B
pointed
C
explained
D
referred
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He made _____ experiments to prove his theory, and the number _____ added up to 600.
#67962
A
a large number of ;have
B
a great deal of; has
C
a great many; has
D
plenty of; have
 The machine has ______ again; I think we’d better buy a new one.
#64565
A
broken off
B
broken up
C
broken into
D
broken down