John, together with some other American soldiers who ____ sent to Iraq, ____ killed in a bomb explosion.
| A．were, were | B．was, was | C．were, was | D．was, were |
No matter how hard he worked, ___ ____
| A．he could not do any better | B．and he could not do any better |
| C．so he could not do any better | D．but he could not do any better |
I’ll start early , _______I oversleep.
| A．unless | B．though | C．if | D．whether |
_______ you begin the work , you must carry it out through to the end.
| A．When | B．Though | C．Sometimes | D．Once |
I’ll start early , _______ it is dark or light .
A. howeverC. whether C. if D. though
He is so strongly built that he looks _______ he could lift an elephant.
| A．if | B．as if | C．like | D．that |