单选题I often visit my par

问题补充：

单选题Ioftenvisitmyparents,wholiveinthecountrysidewhenever____.A.I am convenientB.it will be convenient to meC.I will be convenientD.it is convenient to me

答案：

D解析考察固定句型。When it is convenient to sb,在某人方便的时候；