I have to see the doctor because I ________ a lot lately.
A．have been coughingB．had coughed
C．coughedD．cough
A
考查時態(tài)。句意：我得去看醫(yī)生，因為我最近一直咳嗽得很厲害。lately表示“最近”，常與現(xiàn)在完成時或現(xiàn)在完成進行時連用，此處表示在說話之前一直在持續(xù)的動作，并且有可能持續(xù)下去，因此用現(xiàn)在完成進行時。
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