It is not until recently () our company seems to be showing interest in online marketing.
A. while
B. what
C. that
D. before
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The company's customer service is () effcient that 80 percent of its yearly revenues come from repeat customers.
A. very
B. so
C. such
D. too
Tom was asked to address the conference , () made him feel a bit nervous.
A. which
B. whose
C. that
D. this
() your dealine is , stick to your plan to avoid wasting your time.
A. Whatever
B. However
C. Wherever
D. Whichever
It was because of his carelessness () the big fire destoyed the warehouse.
A. that
B. what
C. which
D. who