After graduating from college, I took some time off to go travelling, ______ turned out to be awise decision.
A. that
B. which
C. when
D. where
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______ the 2020 Olympic Games will be held in Tokyo is quite clear to the people all over theworld.
A. That
B. Whether
C. What
D. If
Though ______ to see us, the professor gave us a warm welcome.
A. surprising
B. as surprised
C. surprised
D. being surprised
两个无穷小比较的结果是 ( )
A. 同阶
B. 高阶
C. 低阶
D. 不确定
Today, we will begin ______ we stopped yesterday so that no point will be left out.
A. when
B. where
C. how
D. what