No matter how frequently＿＿，the works of Beethoven still attract people all over the world.
| A．performed | B．performing |
| C．to be performed | D．being performed |
—_____Iturnontheradio?
—You’dbetternot.Itisnoisyenoughinthisroom.
| A．Shall | B．Must | C．Need | D．Do |
I_____suchamistakeagain.
| A．shallnevermake | B．maynevermake |
| C．canneverdo | D．needneverdo |
He_____notpayunlessheispunishedtopay.
| A．shall | B．will | C．can | D．would |
—_____IwaterthetreesonTuesday?
—No,youneedn’t.
| A．Can | B．Must | C．May | D．Shall |
—Thatmustbeamistake.
—No,it_____amistake.
| A．mustnotbe | B．needn’tbe | C．cannotbe | D．wouldnotbe |