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. Which of the following sentences correctly uses a modal verb to express ability?

A. She must finish her homework by tonight.

B. He can swim across the lake.

C. They should arrive by noon.

D. You might want to check the weather.

choose the grammar structure of present perfect

A. subject , have +simple past verb

B. subject+have-has verb+past participle verb

C. subject+past participle verb +have has

D. subject + has +past participle ver