Question

—To make our city more beautiful, rubbish         into the river.
—I agree.

A．needn’t be thrown

B．mustn’t be thrown

C．can’t throw

D．may not throw

Answer 1

B

考查情景交際和情態(tài)動(dòng)詞�！盀榱俗尦鞘凶兊酶�美好，垃圾禁止被扔進(jìn)河里�！薄巴�意�！� needn’t“不必”；mustn’t“禁止”；can’t“不能”；may not“可能不”。rubbish和throw之間是動(dòng)賓關(guān)系，故用被動(dòng)語態(tài)，先排除C、D；A項(xiàng)語氣不強(qiáng)。故選B。