对旅游市场的准确把握是旅游经营取得成功的关键。
A. 对
B. 错
It is my_________ belief that an effective partnership approach between police and the public is absolutely necessary.
A. firmed
B. firming
C. firms
D. firm
He broke his contract with the ________.
A. firms
B. firm
C. firming
D. firmed
His wife and children moved to______ him in their new home...
A. be joined
B. join
C. joining
D. will join