A.+→
B.→+
C.+→
D.→+
答案:D
Mr. Green and Mr. King have taught English at Beijing Sunshine
Secondary School _____ they came to China two years ago.[ ]
A. since
B. as
C. for
D. until
薄片是指下列哪种规格______
A.0.5mm以下 B.1~2mmC.2~4mm D.3~5mmE.4~6mm