单项选择题
I（）half an hour before she came out of the telephone box and I entered.
A．waited B．have waited C．had been waiting D．was waiting
单项选择题 I'll lend you my computer（）you promise to take care of it.
单项选择题 I have not gone to see the doctor for a long time, but today（）
单项选择题 Either you or Lin Ming（）supposed to do the job.
