Jim has been ill for three weeks and ------(miss)a lot of lessons.
这道呢？WHERE IS YOUR FATHER ？HE -------GO TO BEIJING
He has gone to Beijing 因为还没回来 要用 has gone to
为什么这么添呢？？？
完成时可以表示过去的状态。翻译成错过了。用完成时表示的过去强调对现在的影响。