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【简答题】
The abilities of this businessman were previously doubted by the company that employs him.
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【简答题】设各项均为正数的数列{a n }的前n项和为S n ，已知2a 2 =a 1 +a 3 ，数列{ }是公差为d的等差数列。 （I）求数列{a n }的通项公式（用n，d表示）； （Ⅱ）设c为实数，对满足m+n=3k且m≠n的任意m，n，k，不等式S m +S n >cS k 都成立，求证：c的最大值为 。
【单选题】success of Zhu Zhiwen’s singing has been great honor to his hometown.
A.
The, a
B.
The, an
C.
不填, the
D.
The, 不填
【单选题】The success of Zhu Zhiwen didn't merely good luck． [ ]
A.
result in
B.
lie in
C.
lead to
D.
contribute to
【单选题】Zhu Zhiwen's never been to Hongkong, ______? [ ]
A.
is he
B.
isn't he
C.
has he
D.
hasn't he
【单选题】—Who taught Zhu Zhiwen to sing? —_______! He learned singing by himself.
A.
Everybody
B.
Somebody
C.
Nobody
D.
Anybody
【单选题】Zhu Zhiwen，Overcoat Brother， came here to______ us in singing for the National Day the other day.
A.
join
B.
join in
C.
attend
D.
take part in
【简答题】success of Zhu Zhiwen’s singing has been great honour to his hometown. A．The，a B．The；an C．不填，the D．The，不填
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