—Could you tell me how to improve spoken English?

—Well, just take every chance to practise ______and don’t be shy.  [ ]

A. speak  

B. to speak  

C. speaking  

D. spoke

用¹³¹I-MIBG治疗肾上腺素能肿瘤，给药方法为（）。

A.缓慢静脉推注

B.静脉推注

C.快速静脉滴注

D.60-90min慢静脉滴注

E.口服