1.the new plan is (better) to the previous one but it still has some problems.(better该改成什么)
2.The number of people who are considering to buy a sports car continues to rise.
3.Janet (will work )for the company until she retired as the editor in 2009.(是改成worked,还是has worked,还是had worked呢?为什么)
4.I will have spoken with Jane on the phone.(这句话是个例句。是什么意思。为什么既有将来时,又有完成时,或是分词?)