He is looking forward ________his father.
| A．of receiving | B．to receiving | C．to hearing from | D．to hear from |
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 |