—I don't think we have met before，________？
—Yes，once at a party，but we weren't introduced.
| A．do I | B．have we | C．don't I | D．haven't you |
--- Did you go to London for vacation?
--- I _____ to go, but I got sick at the last minutes.
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Higher temperature turning large ice sheet to water would cause _____ rise in sea levels worldwide and change _____ weather on earth.
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It was raining heavily. Little Mary felt cold, so she stood _______ to her mother.
| A．close | B．closely | C．closed | D．closing |
I will never understand how it __________ that you were an hour late on such a short journey.
| A．was happened | B．came about | C．took the place | D．came out |
We won’t give up _______ we should fail ten times.
| A．since | B．even if | C．whether | D．as if |