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We have no choice. _______ we go or we stay, the result is the same.

A．Once             B．Unless            C．Whether          D．While

The tourists can not help wondering ______ the ancient people could manage to complete the magnificent building without modern equipment.

A．that              B．how              C．where            D．what

There was a big dog ______ in front of Mr. Hill’s house, so David didn’t dare to go near it.

A．to sit             B．sat               C．sitting            D．sits

You got back so late and you didn’t even give me a proper reason _______ you hadn’t called me! I’m very unhappy with you.

A．when            B．why              C．how              D．which

The animal makes a strange sound, slightly ______ the bark of a dog.

A．resembling        B．requesting         C．resisting          D．reflecting

Unfortunately, when I dropped in, Dr. Green ______, so we only had time for a few words.

A．just left           B．has just left        C．had just left        D．was just leaving

_______ you don’t stay out too late, you may go to the party. But remember to be back here no later than 11:30 pm.

A．Now that          B．Until             C．Provided that      D．Although

His answer was _______, so no one could make out what he meant.

A．ambiguous        B．unconscious       C．transparent        D．explicit

______ the sound on the step, the boy rushed out to see if his mother had come back.

A．To hear           B．Hearing           C．Heard            D．Hear

We have such a long car journey tomorrow. Make sure we bring enough food and games _____ for 4 hours so the kids won’t get bored.

A．lasted            B．lasting            C．to last            D．last