His answer was _______, so no one could make out what he meant.
A.ambiguous B.unconscious C.transparent D.explicit
_______ 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
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
The animal makes a strange sound, slightly ______ the bark of a dog.
A.resembling B.requesting C.resisting D.reflecting
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
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