A recent study found that the number of smartphone users _____ sharply over the past five years.（　?。?/h1>

A．has increased	B．have increased
C．is increasing	D．a(chǎn)re increasing

【答案】A

【解答】

【點(diǎn)評(píng)】

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A．will be increasing	B．has increased
C．were increasing	D．have increased

A．were made	B．have made
C．a(chǎn)re made	D．have been made

A recent study found that the number of smartphone users _____ sharply over the past five years.（ ?。?/h1>