问题

Do you think Maths __________useful subject?
A:is a
B:is an
C:are a
D:are an
B:is an
C:are a
D:are an
正确答案是:
同类题型
Fish can’t live _____water.[ ]
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Do you _________ lots of time exercising every day? —Yes, it’s good for my health.
Please write _______ me and tell me _______ yourself. [ ]
My father often brings me____, so I’m always happy when he comes back.