问题

________， the disease diphtheria will produce a powder poison that will kill the patient.[ ]

A:If it untreated
B:If is untreated
C:If being untreated
D:If untreated

正确答案是：

同类题型

not like my visit, but Ishall go and see him _____

61 I don’t know what his interests are, because we talked ______ about work when we met

_______ her leg was wounded, she _______ up the stairs

Have you ever been to Houyi Park—Of course. The places of interest there are well worth_____________.

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