The first decade of the 21st century ______ breathtaking, non-stop development in China.
#101152
A
witnesses
B
witnessed
C
will witness
D
had witnessed
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It is bad manners to ________an invitation without a reason.
#99896
A
break down
B
settle down
C
turn down
D
calm down
I was out of town at that time, so I don’t know exactly how it ______.
#101769
A
was happening
B
happened
C
has happened
D
happens