Jack has learned more about teamwork（团队合作） _______ he joined the soccer team．（ ）
| A． |
until |
B． |
since |
C． |
while |
D． |
though |
I like novels written by J．K．Rowling．So far I all her works about Harry Potter．（ ）
A．have readB．readC．am reading
He looks worried．I wonder he has already known about the result．（ ）
A．whereB．whetherC．why
What do you think of the basketball match between Liaoning and Guangdong？
（ ）
A．Wonderful!B．I think so．
C．No problem．
We were not good friends we saw each other，but gradually，we got along better and better．（ ）
A．untilB．whenC．if
My sister has gone to work in Beijing， not for money， but herself．（ ）
A．improveB．improvedC．to improve