Buses here are always crowded with passengers, so I prefer _____ there rather than take a bus. 

A．cycle

B．cycling

C．to cycle

D．being cycled

甲亢内科治疗停药首选实验室检查（）。

A.TT₄、FT₄

B.TT₃、TT₃

C.TRAb

D.rT₃

E.甲状腺摄¹³¹I