A、 repairing B、 be repaired C、 repaired D、 to be repaired
单项选择题The work （） by the time you got there.
A、 has been finished B、 had been finished C、 was finished D、 will be finished
单项选择题Not until I had read your letter （） the true state of affairs.
A、 I understood B、 I did understand C、 did I understand D、 I understand
