Nowadays people take___ exercise a day as they did in the past because of widely used automobiles.
| A．less than half | B．less than as half as |
| C．less than half as much | D．half less than |
He is so strongly built that he looks _________ he could lift an elephant.
| A．if | B．as if |
| C．like | D．that. |
_________ you begin the work, you must carry it out through tothe end.
| A．When | B．Though |
| C．Sometimes | D．Once |
I'll start early, _________ I oversleep.
| A．unless | B．though |
| C．if | D．whether |
I insisted that a doctor _________ immediately.
| A．has been sent for | B．sends for |
| C．will be sent for | D．be sent for |
His pale face suggested that he _________ frightened.
| A．be | B．was |
| C．would be | D．were |