——Jim is addicted to novels recently.——Yes, that might _____ why he did so badly in the last test.
The report said that the increase in oil prices has many changes in our lives.
— I telephoned him twice and I couldn’t get through to him. —The line might have been out of order, _______?
Miss Li _______ as a secretary for five years in the company, and now she is general manager of it.
I heard the clock eight when I woke up.
We'll have to work the clock if we want to complete the work on time.