----I _____this morning, but he could not come.
----Well, we’d better go and _____at his office.
| A．called him; call on him | B．called on him; call him |
| C．called at him; call | D．called him; call at him |
The great _______ of my plan is that it’s so cheap compared to the others.
| A．power | B．strength | C．energy | D．force |
The rescuers _______ to work as soon as they arrived at the spot of the accident.
| A．set out | B．set off | C．set up | D．set in |
I’ll never forget the good trick my classmates ________ on me when I was in the primary school.
| A．paid | B．acted | C．played | D．made |
Maybe Mr. Green is really in ______ debt, for he is losing ______ weight quickly.
| A．/ ; his | B．/ ; / | C．the; / | D．a; / |
________ many times, he still couldn’t understand it.
| A．Told | B．Being told | C．Having been told | D．Having told |