Only after you explained it to me ____ it was not my teacher’s fault.
| A．I realized | B．had I realized | C．realized I | D．did I realize |
He ______. It's a shame my mobile phone was power-off.
| A．ought to call me | B．could have called me |
| C．may be calling me | D．might call me |
We' ve published large quantities of books. This year___ we've published three million.
| A．only | B．just | C．alone | D．merely |
--- Haven't I told you that I like the beef well done?
---Yes, but I _____ it longer than I usually do.
| A．was cooking | B．will cook | C．cooked | D．had cooked |
_____ good, these cookies sell well.
| A．Smelled | B．Smelling | C．Being smelled | D．To smell |
What ______ public is concerned about is whether medical workers and scientists will be able to find for this new disease in a short time.
| A．不填;不填 | B．不填;the | C．the;不填 | D．the;a |