caused the accident is still a mystery.
| A．How | B．What | C．That | D．Where |
The mother many things to get her daughter a good education.
| A．purchase | B．produce | C．sacrifice | D．store |
Ted is such a helpful colleague that he is willing to do,,any favour we might ask him.
| A．without question | B．in addition | C．as a result | D．on the contrary |
—Did you ask your elder brother for help?
—I need to. I managed it by myself.
| A．don't | B．wouldn't | C．didn't | D．won't |
We will be given a(n)to ask questions at the end of the lecture.
| A．presentation | B．explanation | C．opportunity | D．possibility |
We all sighed with relief when plane finally landed safely.
| A．a;不填 | B．不填;the | C．a;a | D．a;the |