The last decade of the 21st century ________ the rapid, steady development of China in various fields.
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A
witnessed
B
was witnessed
C
is witnessed
D
had witnessed
推荐题目
He _____ football regularly for many years when he was young.
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A
played
B
was playing
C
has played
D
had played
When the old man_____to walk back to his house,the sun____itself behind the mountain.
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A
was starting;hid
B
had started;had already hidden
C
had started;was hiding
D
started;had already hidden