Good speaking skills ____.A is a must B is a necessary C are a must D are a necessary

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Good speaking skills ____.A is a must B is a necessary C are a must D are a necessary

Good speaking skills ____.A is a must B is a necessary C are a must D are a necessary
Good speaking skills ____.A is a must B is a necessary C are a must D are a necessary

Good speaking skills ____.A is a must B is a necessary C are a must D are a necessary
is a must

D

A

选C:are a must.
首先,skills是复数要用are 排除 A和B
其次,must解释为:必不可少的事物;necessary解释为:(生活)必需品