—I wonder why Susan looks worried today.
—I’m not sure, but she _____a small accident driving here.
| A．could have | B．might have | C．might have had | D．must have had |
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series
| A．serious | B．reception | C．energetic | D．equal |
feast
| A．breast | B．league | C．measure | D．wealthy |
insurance
| A．usual | B．usage | C．suitcase | D．ensure |
exist
| A．express | B．extremely | C．exactly | D．exit |
oxygen
| A．genuine | B．gravity | C．garlic | D．glory |
Our teacher looked here and there on our playground _______ looking for something.
| A．even though | B．even if |
| C．only if | D．as if |
Progress so far has been very good._________ , we are sure that the project will be
completed on time.
| A．however | B．Otherwise | C．Therefore | D．Besides |
Only then _______ how much damage had been caused.
| A．did she realize | B．she realized |
| C．had she realized | D．she had realized |
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