<bold><link type="page"><caption> 点击收听节目</caption><url href="http://www.bbc.co.uk/ukchina/simp/elt/2015/04/150430_qanda_342_past_simple_present_perfect ...

To play this video you need to enable JavaScript. Do you have a question you want us to answer? You can send us your questions to [email protected] 1. We can use both present perfect and past ...