No matter ______ the CRH accident in Wenzhou, it had and will have much warning significance.
| A．how the investigators said caused | B．what the investigators said caused |
| C．why the investigators said caused | D．the investigators said how caused |
Something _______ wrong with the machine, and it _______ not work.
| A．being; could | B．going; should | C．were; might | D．went; would |
Today everyone arrived earlier than _______.
| A．expecting | B．having expecting | C．to expect | D．expected[来源 |
Just as the experts _______ it, this kind of material is not natural, but man-made.
| A．get | B．put | C．make | D．mean |
¾ Are you waiting for a bus from Medical University?
¾ Yes. I arrived here at the bus stop ten minutes ago, but the bus _______.
| A．hadn’t come | B．won’t come | C．didn’t come | D．hasn’t come |
¾ Who invented _______ cell phone?
¾ I don’t know. Maybe _______ European.
| A．the; an | B．the; a | C．/; / |
D．a; the |